﻿19:@0.921900:0.510692:0.940807:0.510692:0.940807:0.494068:0.921900:0.494068:0.000000:0.000000
2. :@0.120102:0.100407:0.138843:0.100407:0.138843:0.083271:0.120102:0.083271:0.000000:0.000000:0.000000
Aplica:@0.153346:0.100407:0.200852:0.100407:0.200852:0.083783:0.153346:0.083783:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000
 el método indicado en cada ítem para :@0.200852:0.100407:0.496321:0.100407:0.496321:0.084018:0.200852:0.084018:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000
hallar la solución (en función de  ) de los sis-:@0.153346:0.117003:0.492322:0.117003:0.492322:0.100614:0.153346:0.100614:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000
x:@0.400368:0.117003:0.407831:0.117003:0.407831:0.100642:0.400368:0.100642:0.000000
temas  de ecuaciones  planteados, donde :@0.153346:0.133600:0.496376:0.133600:0.496376:0.117211:0.153346:0.117211:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000
xy z:@0.157426:0.150195:0.194669:0.150195:0.194669:0.133833:0.157426:0.133833:0.000000:0.000000:0.000000:0.000000
:@0.215381:0.151066:0.228686:0.151066:0.228686:0.134317:0.215381:0.134317:0.000000
∈:@0.198889:0.150872:0.212028:0.150872:0.212028:0.135299:0.198889:0.135299:0.000000
,,:@0.166585:0.150195:0.184976:0.150195:0.184976:0.133806:0.166585:0.133806:0.000000:0.000000
 denotan las incógnitas.:@0.232080:0.150195:0.405206:0.150195:0.405206:0.133806:0.232080:0.133806:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000
a) :@0.153339:0.193414:0.172061:0.193414:0.172061:0.176514:0.153339:0.176514:0.000000:0.000000:0.000000
4 –3:@0.199095:0.182101:0.242162:0.182101:0.242162:0.166431:0.199095:0.166431:0.000000:0.000000:0.000000:0.000000
8:@0.290599:0.182101:0.299592:0.182101:0.299592:0.166431:0.290599:0.166431:0.000000
–5:@0.211183:0.202847:0.231903:0.202847:0.231903:0.187177:0.211183:0.187177:0.000000:0.000000
2:@0.255472:0.202847:0.264465:0.202847:0.264465:0.187177:0.255472:0.187177:0.000000
15:@0.287982:0.202847:0.305765:0.202847:0.305765:0.187177:0.287982:0.187177:0.000000:0.000000
+=:@0.253585:0.182779:0.288045:0.182779:0.288045:0.167206:0.253585:0.167206:0.000000:0.000000
+:@0.243321:0.203524:0.220286:0.203524:0.220286:0.187951:0.243321:0.187951:0.000000
=:@0.276463:0.203524:0.253429:0.203524:0.253429:0.187951:0.276463:0.187951:0.000000
⎧:@0.189181:0.181686:0.198284:0.181686:0.198284:0.166113:0.189181:0.166113:0.000000
⎨:@0.189181:0.193276:0.198284:0.193276:0.198284:0.177703:0.189181:0.177703:0.000000
⎩:@0.189181:0.205225:0.198284:0.205225:0.198284:0.189653:0.189181:0.189653:0.000000
x:@0.210059:0.182115:0.217522:0.182115:0.217522:0.166722:0.210059:0.166722:0.000000
yz:@0.242987:0.182115:0.274056:0.182115:0.274056:0.166722:0.242987:0.166722:0.000000:0.000000
x:@0.199795:0.202860:0.207258:0.202860:0.207258:0.187467:0.199795:0.187467:0.000000
y:@0.232723:0.202860:0.240205:0.202860:0.240205:0.187467:0.232723:0.187467:0.000000
z:@0.265340:0.202860:0.272582:0.202860:0.272582:0.187467:0.265340:0.187467:0.000000
 :@0.153302:0.228723:0.157338:0.228723:0.157338:0.212334:0.153302:0.212334:0.000000
Por sustitución:@0.186545:0.228723:0.294900:0.228723:0.294900:0.212334:0.186545:0.212334:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000
 :@0.153302:0.329062:0.157117:0.329062:0.157117:0.312161:0.153302:0.312161:0.000000
b) :@0.153344:0.368989:0.173375:0.368989:0.173375:0.352088:0.153344:0.352088:0.000000:0.000000:0.000000
2:@0.222550:0.357839:0.231542:0.357839:0.231542:0.342169:0.222550:0.342169:0.000000
3:@0.255535:0.357839:0.264528:0.357839:0.264528:0.342169:0.255535:0.342169:0.000000
0:@0.288779:0.357839:0.297771:0.357839:0.297771:0.342169:0.288779:0.342169:0.000000
3:@0.198373:0.378585:0.207365:0.378585:0.207365:0.362915:0.198373:0.362915:0.000000
6:@0.231275:0.378585:0.240268:0.378585:0.240268:0.362915:0.231275:0.362915:0.000000
9:@0.264624:0.378585:0.273616:0.378585:0.273616:0.362915:0.264624:0.362915:0.000000
1:@0.297526:0.378585:0.306519:0.378585:0.306519:0.362915:0.297526:0.362915:0.000000
+⎧:@0.210404:0.358517:0.198304:0.357417:0.198304:0.341844:0.210404:0.342944:0.000000:0.000000
+:@0.243388:0.358517:0.220777:0.358517:0.220777:0.342944:0.243388:0.342944:0.000000
=:@0.276115:0.358517:0.253505:0.358517:0.253505:0.342944:0.276115:0.342944:0.000000
+ ⎩:@0.218779:0.379262:0.198304:0.380956:0.198304:0.365383:0.218779:0.363689:0.000000:0.000000:0.000000
+:@0.252496:0.379262:0.229093:0.379262:0.229093:0.363689:0.252496:0.363689:0.000000
=:@0.286005:0.379262:0.262602:0.379262:0.262602:0.363689:0.286005:0.363689:0.000000
⎨:@0.189201:0.369007:0.198304:0.369007:0.198304:0.353434:0.189201:0.353434:0.000000
x:@0.199833:0.357845:0.207297:0.357845:0.207297:0.342452:0.199833:0.342452:0.000000
y:@0.232815:0.357845:0.240297:0.357845:0.240297:0.342452:0.232815:0.342452:0.000000
z:@0.265008:0.357845:0.272250:0.357845:0.272250:0.342452:0.265008:0.342452:0.000000
x:@0.208200:0.378591:0.215663:0.378591:0.215663:0.363198:0.208200:0.363198:0.000000
y:@0.241913:0.378591:0.249395:0.378591:0.249395:0.363198:0.241913:0.363198:0.000000
z:@0.274898:0.378591:0.282141:0.378591:0.282141:0.363198:0.274898:0.363198:0.000000
 :@0.153344:0.404280:0.157380:0.404280:0.157380:0.387891:0.153344:0.387891:0.000000
Por eliminación gaussiana:@0.186587:0.404280:0.376687:0.404280:0.376687:0.387891:0.186587:0.387891:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000
 :@0.153344:0.527066:0.157158:0.527066:0.157158:0.510165:0.153344:0.510165:0.000000
c) :@0.153344:0.567700:0.170979:0.567700:0.170979:0.550800:0.153344:0.550800:0.000000:0.000000:0.000000
–:@0.198729:0.555862:0.207943:0.555862:0.207943:0.540192:0.198729:0.540192:0.000000
2:@0.281497:0.555862:0.290490:0.555862:0.290490:0.540192:0.281497:0.540192:0.000000
–2:@0.198729:0.576607:0.216936:0.576607:0.216936:0.560937:0.198729:0.560937:0.000000:0.000000
6:@0.241297:0.576607:0.250290:0.576607:0.250290:0.560937:0.241297:0.560937:0.000000
3:@0.274651:0.576607:0.283644:0.576607:0.283644:0.560937:0.274651:0.560937:0.000000
2:@0.307895:0.576607:0.316888:0.576607:0.316888:0.560937:0.307895:0.560937:0.000000
++ =:@0.220300:0.556539:0.278959:0.556539:0.278959:0.540966:0.220300:0.540966:0.000000:0.000000:0.000000:0.000000
+ ⎩:@0.228777:0.577285:0.198297:0.578986:0.198297:0.563413:0.228777:0.561712:0.000000:0.000000:0.000000
+:@0.262494:0.577285:0.239883:0.577285:0.239883:0.561712:0.262494:0.561712:0.000000
=:@0.295221:0.577285:0.272610:0.577285:0.272610:0.561712:0.295221:0.561712:0.000000
⎧:@0.189194:0.555447:0.198297:0.555447:0.198297:0.539874:0.189194:0.539874:0.000000
⎨:@0.189194:0.567036:0.198297:0.567036:0.198297:0.551464:0.189194:0.551464:0.000000
x yz:@0.209722:0.555875:0.264978:0.555875:0.264978:0.540482:0.209722:0.540482:0.000000:0.000000:0.000000:0.000000
x:@0.218199:0.576621:0.225662:0.576621:0.225662:0.561228:0.218199:0.561228:0.000000
y:@0.251912:0.576621:0.259394:0.576621:0.259394:0.561228:0.251912:0.561228:0.000000
z:@0.284106:0.576621:0.291348:0.576621:0.291348:0.561228:0.284106:0.561228:0.000000
 :@0.153344:0.602991:0.157380:0.602991:0.157380:0.586603:0.153344:0.586603:0.000000
Por eliminación gaussiana:@0.186587:0.602991:0.376687:0.602991:0.376687:0.586603:0.186587:0.586603:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000
 :@0.153344:0.725777:0.157158:0.725777:0.157158:0.708876:0.153344:0.708876:0.000000
d) :@0.153344:0.765054:0.173412:0.765054:0.173412:0.748153:0.153344:0.748153:0.000000:0.000000:0.000000
2 – 4:@0.198364:0.754573:0.241437:0.754573:0.241437:0.738903:0.198364:0.738903:0.000000:0.000000:0.000000:0.000000:0.000000
16:@0.289874:0.754573:0.307657:0.754573:0.307657:0.738903:0.289874:0.738903:0.000000:0.000000
4:@0.199101:0.775318:0.208094:0.775318:0.208094:0.759649:0.199101:0.759649:0.000000
4 –3:@0.233548:0.775318:0.276615:0.775318:0.276615:0.759649:0.233548:0.759649:0.000000:0.000000:0.000000:0.000000
0:@0.300866:0.775318:0.309859:0.775318:0.309859:0.759649:0.300866:0.759649:0.000000
+=:@0.254016:0.755251:0.288475:0.755251:0.288475:0.739678:0.254016:0.739678:0.000000:0.000000
+:@0.220665:0.775996:0.163245:0.775996:0.163245:0.760423:0.220665:0.760423:0.000000
=:@0.288202:0.775996:0.230782:0.775996:0.230782:0.760423:0.288202:0.760423:0.000000
⎧:@0.189201:0.754151:0.198304:0.754151:0.198304:0.738578:0.189201:0.738578:0.000000
⎨:@0.189201:0.765740:0.198304:0.765740:0.198304:0.750167:0.189201:0.750167:0.000000
⎩:@0.189201:0.777690:0.198304:0.777690:0.198304:0.762117:0.189201:0.762117:0.000000
x:@0.208623:0.754579:0.216087:0.754579:0.216087:0.739186:0.208623:0.739186:0.000000
yz:@0.243437:0.754579:0.274506:0.754579:0.274506:0.739186:0.243437:0.739186:0.000000:0.000000
x:@0.210098:0.775325:0.217561:0.775325:0.217561:0.759932:0.210098:0.759932:0.000000
y:@0.244544:0.775325:0.252026:0.775325:0.252026:0.759932:0.244544:0.759932:0.000000
z:@0.277106:0.775325:0.284348:0.775325:0.284348:0.759932:0.277106:0.759932:0.000000
 :@0.153344:0.800345:0.157380:0.800345:0.157380:0.783956:0.153344:0.783956:0.000000
Por sustitución:@0.186587:0.800345:0.294942:0.800345:0.294942:0.783956:0.186587:0.783956:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000
 :@0.153344:0.923131:0.157158:0.923131:0.157158:0.906230:0.153344:0.906230:0.000000
e) :@0.545667:0.115606:0.564537:0.115606:0.564537:0.098706:0.545667:0.098706:0.000000:0.000000:0.000000
4:@0.615599:0.104902:0.624592:0.104902:0.624592:0.089232:0.615599:0.089232:0.000000
–8:@0.674548:0.104902:0.692754:0.104902:0.692754:0.089232:0.674548:0.089232:0.000000:0.000000
2 –5 –:@0.590685:0.125647:0.654450:0.125647:0.654450:0.109977:0.590685:0.109977:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000
13:@0.680679:0.125647:0.698461:0.125647:0.698461:0.109977:0.680679:0.109977:0.000000:0.000000
+:@0.602719:0.105579:0.612835:0.105579:0.612835:0.090006:0.602719:0.090006:0.000000
+=:@0.637169:0.105579:0.671629:0.105579:0.671629:0.090006:0.637169:0.090006:0.000000:0.000000
=:@0.669150:0.126325:0.679267:0.126325:0.679267:0.110752:0.669150:0.110752:0.000000
⎧:@0.581508:0.104487:0.590612:0.104487:0.590612:0.088914:0.581508:0.088914:0.000000
⎨:@0.581508:0.116077:0.590612:0.116077:0.590612:0.100504:0.581508:0.100504:0.000000
⎩:@0.581508:0.128026:0.590612:0.128026:0.590612:0.112453:0.581508:0.112453:0.000000
x:@0.592141:0.104915:0.599604:0.104915:0.599604:0.089522:0.592141:0.089522:0.000000
yz:@0.626588:0.104915:0.657657:0.104915:0.657657:0.089522:0.626588:0.089522:0.000000:0.000000
x:@0.600931:0.125661:0.608394:0.125661:0.608394:0.110268:0.600931:0.110268:0.000000
y z:@0.633859:0.125661:0.665288:0.125661:0.665288:0.110268:0.633859:0.110268:0.000000:0.000000:0.000000
 :@0.545648:0.155935:0.549684:0.155935:0.549684:0.139547:0.545648:0.139547:0.000000
Por sustitución:@0.578892:0.155935:0.687246:0.155935:0.687246:0.139547:0.578892:0.139547:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000
 :@0.545648:0.278721:0.549463:0.278721:0.549463:0.261820:0.545648:0.261820:0.000000
f) :@0.545667:0.324540:0.562491:0.324540:0.562491:0.307639:0.545667:0.307639:0.000000:0.000000:0.000000
6:@0.664292:0.312537:0.673285:0.312537:0.673285:0.296868:0.664292:0.296868:0.000000
–:@0.603513:0.333283:0.612726:0.333283:0.612726:0.317613:0.603513:0.317613:0.000000
2:@0.639426:0.333283:0.648419:0.333283:0.648419:0.317613:0.639426:0.317613:0.000000
5:@0.673094:0.333283:0.682086:0.333283:0.682086:0.317613:0.673094:0.317613:0.000000
++ =:@0.602727:0.313215:0.661386:0.313215:0.661386:0.297642:0.602727:0.297642:0.000000:0.000000:0.000000:0.000000
+:@0.627273:0.333961:0.604238:0.333961:0.604238:0.318388:0.627273:0.318388:0.000000
=:@0.660415:0.333961:0.637380:0.333961:0.637380:0.318388:0.660415:0.318388:0.000000
⎧:@0.581517:0.312122:0.590620:0.312122:0.590620:0.296550:0.581517:0.296550:0.000000
⎨:@0.581517:0.323712:0.590620:0.323712:0.590620:0.308139:0.581517:0.308139:0.000000
⎩:@0.581517:0.335662:0.590620:0.335662:0.590620:0.320089:0.581517:0.320089:0.000000
x yz:@0.592149:0.312551:0.647405:0.312551:0.647405:0.297158:0.592149:0.297158:0.000000:0.000000:0.000000:0.000000
xy:@0.592149:0.333297:0.624177:0.333297:0.624177:0.317904:0.592149:0.317904:0.000000:0.000000
z:@0.649310:0.333297:0.656552:0.333297:0.656552:0.317904:0.649310:0.317904:0.000000
 :@0.545667:0.364860:0.549702:0.364860:0.549702:0.348471:0.545667:0.348471:0.000000
Por eliminación gaussiana:@0.578910:0.364860:0.769010:0.364860:0.769010:0.348471:0.578910:0.348471:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000
 :@0.545667:0.487645:0.549481:0.487645:0.549481:0.470745:0.545667:0.470745:0.000000
g) :@0.545667:0.531681:0.565587:0.531681:0.565587:0.514781:0.545667:0.514781:0.000000:0.000000:0.000000
– –:@0.591054:0.521474:0.622622:0.521474:0.622622:0.505805:0.591054:0.505805:0.000000:0.000000:0.000000
–2:@0.674555:0.521474:0.692762:0.521474:0.692762:0.505805:0.674555:0.505805:0.000000:0.000000
4:@0.615599:0.542220:0.624592:0.542220:0.624592:0.526550:0.615599:0.526550:0.000000
2:@0.649313:0.542220:0.658306:0.542220:0.658306:0.526550:0.649313:0.526550:0.000000
–8:@0.683341:0.542220:0.701548:0.542220:0.701548:0.526550:0.683341:0.526550:0.000000:0.000000
+=:@0.637178:0.522152:0.671638:0.522152:0.671638:0.506579:0.637178:0.506579:0.000000:0.000000
+ ⎩:@0.602737:0.542898:0.590630:0.544599:0.590630:0.529026:0.602737:0.527325:0.000000:0.000000:0.000000
+:@0.637187:0.542898:0.614153:0.542898:0.614153:0.527325:0.637187:0.527325:0.000000
=:@0.670330:0.542898:0.647295:0.542898:0.647295:0.527325:0.670330:0.527325:0.000000
⎧:@0.581527:0.521059:0.590630:0.521059:0.590630:0.505487:0.581527:0.505487:0.000000
⎨:@0.581527:0.532649:0.590630:0.532649:0.590630:0.517076:0.581527:0.517076:0.000000
x yz:@0.602055:0.521488:0.657677:0.521488:0.657677:0.506095:0.602055:0.506095:0.000000:0.000000:0.000000:0.000000
x:@0.592160:0.542234:0.599623:0.542234:0.599623:0.526841:0.592160:0.526841:0.000000
y:@0.626606:0.542234:0.634088:0.542234:0.634088:0.526841:0.626606:0.526841:0.000000
z:@0.659223:0.542234:0.666465:0.542234:0.666465:0.526841:0.659223:0.526841:0.000000
 :@0.545667:0.572024:0.549702:0.572024:0.549702:0.555635:0.545667:0.555635:0.000000
Por sustitución:@0.578910:0.572024:0.687265:0.572024:0.687265:0.555635:0.578910:0.555635:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000
 :@0.545667:0.694810:0.549481:0.694810:0.549481:0.677909:0.545667:0.677909:0.000000
h) :@0.545667:0.741170:0.565568:0.741170:0.565568:0.724269:0.545667:0.724269:0.000000:0.000000:0.000000
–:@0.603511:0.728612:0.612725:0.728612:0.612725:0.712942:0.603511:0.712942:0.000000
2:@0.639425:0.728612:0.648417:0.728612:0.648417:0.712942:0.639425:0.712942:0.000000
5:@0.673092:0.728612:0.682085:0.728612:0.682085:0.712942:0.673092:0.712942:0.000000
– –3:@0.603511:0.749358:0.648784:0.749358:0.648784:0.733688:0.603511:0.733688:0.000000:0.000000:0.000000:0.000000
–10:@0.673401:0.749358:0.700398:0.749358:0.700398:0.733688:0.673401:0.733688:0.000000:0.000000:0.000000
+:@0.627283:0.729290:0.604248:0.729290:0.604248:0.713717:0.627283:0.713717:0.000000
=:@0.660425:0.729290:0.637390:0.729290:0.637390:0.713717:0.660425:0.713717:0.000000
=:@0.660379:0.750035:0.670495:0.750035:0.670495:0.734462:0.660379:0.734462:0.000000
⎧:@0.581545:0.728197:0.590648:0.728197:0.590648:0.712624:0.581545:0.712624:0.000000
⎨:@0.581545:0.739787:0.590648:0.739787:0.590648:0.724214:0.581545:0.724214:0.000000
⎩:@0.581545:0.751736:0.590648:0.751736:0.590648:0.736164:0.581545:0.736164:0.000000
xy:@0.592178:0.728626:0.624205:0.728626:0.624205:0.713233:0.592178:0.713233:0.000000:0.000000
z:@0.649339:0.728626:0.656581:0.728626:0.656581:0.713233:0.649339:0.713233:0.000000
xy:@0.592178:0.749372:0.624205:0.749372:0.624205:0.733978:0.592178:0.733978:0.000000:0.000000
z:@0.649285:0.749372:0.656527:0.749372:0.656527:0.733978:0.649285:0.733978:0.000000
 :@0.545685:0.781499:0.549721:0.781499:0.549721:0.765110:0.545685:0.765110:0.000000
Por sustitución:@0.578928:0.781499:0.687283:0.781499:0.687283:0.765110:0.578928:0.765110:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000:0.000000
 :@0.545685:0.904285:0.549500:0.904285:0.549500:0.887384:0.545685:0.887384:0.000000