a series parallel circuit with a 3V dc power source connected to 3 resistors. R1 and R2 are in series with the voltage source and R3 is in parallel with R2. It is given that 4amps is flowing through R1 and 2amps is flowing through R2. there are also 2 amps flowing through R3 since the sum of the branch currents equals total current which is 4amps. determine the values of each resistor.