The resistors in the circuit below have the following values: r1 = 7.50 ω, r2 = 7.00 ω, and r3 = 3.90 ω. the two batteries each have a voltage of 3.00 v. a circuit consists of three vertical wires connected at the top and bottom to each other. the left wire contains a resistor labeled r_3. the center wire contains a resistor labeled r_2. the right wire starts at the bottom with a battery labeled emf 2 with its negative pole pointing towards the top, which is then connected to a resistor labeled r_1 which is then connected to the positive pole of a battery labeled emf 1. the negative pole is then connected to the top connection point of the three wires. (a) find the current in through r3. a (b) how much power do the batteries deliver