Explanation:
1. Rt = 30/(1+3+6) = 30/10= 3 ohm
i = V/Rt = 15/3 = 5 A
2. Rt = 3+1+ (12×6)/(12+6)
= 4 + (72/18)
= 4+4 = 8 ohm
i = 12/(8+2)
= 12/10 = 1,2 A
