The voltage, V (in volts), across a circuit is given by Ohm's law: V = IR, where I is the current (in amps) flowing through the circuit and R is the resistance (in ohms). If we place two circuits, with resistance Rj and R2, in parallel, then their combined resistance, R, is given by 1 1 R + R1 R2 Suppose the current is 5 amps and increasing at 0.02 amps/sec and Rj is 4 ohms and increasing at 0.4 ohms/sec, while R2 is 4 ohms and decreasing at 0.3 ohms/sec. Calculate the rate at which the voltage is changing. -0.02125 volts/sec