The current in the figure below is 0.60 A. (Let the internal resistance of battery 1 be r = 1.52 and the internal resistance of battery 2 be r = 1.1 2.) 6.0 V Battery 1 a (a) Find the voltage drop Vab R (b) Find the power dissipated in R. 9.0 V WH Battery 2 b (c) Find the useful electric power supplied by battery 2. (Note: Do not forget the internal resistance of battery 2.) (d) Find the rate at which chemical energy is stored in battery 1. (Note: Do not include power dissipated in the internal resistor of battery 1 in your answer.)