Please help!

A.

(This is part (a) of a three-part question.) Given this circuit as shown, what is the voltage V0 in volts of the middle battery that makes the current I1 going through the left battery vanish? (This is part (b) of the previous question.) For the circuit shown in part (a) with V0 given as solved for in part (a), what then is |2 in amps that goes through the right battery? {If '2 ows in the opposite direction to the shown arrows, then report its answer as a negative number.) (This is part (c) of the previous question.) For the circuit shown in part {a} with V0 given as solved for in part (a), what then is I3 in amps that goes through the middle battery? (It l3 ows in the opposite direction to the shown arrows, then report its answer as a negative number.)