the electrical circuit consists of three batteries e1 = 18 V; e2 = 12 V; e3 = 36 V, each of which has a resistance in r1 = 2 ohms; r2 = 5 ohms; e3 = 4 ohms which are then coupled with four resistors...

the electrical circuit consists of three batteries e1 = 18 V; e2 = 12 V; e3 = 36 V, each of which has a resistance in r1 = 2 ohms; r2 = 5 ohms; e3 = 4 ohms which are then coupled with four resistors R1 = 8 ohms; R2 = 6 ohms; R3 = 1 ohms; R4 = 3 ohms. count it
a. current passing through R1, R2, R3
b. potential difference between points A and B
c. If between points A and B is given a resistance of 9 ohms, determine the current in each branch using the branch current method