The figure below shows with two batteries and three resistors. The potential difference across the batteries and the resistance of each resistor is given in the figure.
12.0 V
4.00 $\Omega$
2.00 $\Omega$
5.88 $\Omega$
7.50 V
(a) What is the current (in A) in the 2.00 $\Omega$ resistor? (Enter the magnitude.)
(b) What is the potential difference (in V) between points a and b, that is, $\Delta V = V_b - V_a$?