A network of resistors is connected to a 16 V battery with an internal resistance of $1\Omega$, as shown in the figure. The equivalent resistance of the network is:

$1. 4\Omega$
$2. 5\Omega$
$3. 7\Omega$
$4. 2\Omega$

A network of resistors is connected to a 16 V battery with an internal resistance of $1 \Omega$, as shown in the figure. The current in $1 \Omega$ resistor between B and C will be:

$1. 4 A$
$2. 2 A$
$3. 1 A$
$4. 3 A$