A battery of 10 V and negligible internal resistance is connected across the diagonally opposite corners of a cubical network consisting of 12 resistors each of resistance $1 \Omega$ (as shown in the figure). The total current in the network is:

$1. 6 A$
$2. 12 A$
$3. 4 A$
$4. 2 A$

The current in the branch AB in the given network is:

 
1. 5/8 A

2. 5/2 A

3. 15/8 A

4. 3/2 A