The picture for the question wouldn't load, but the picture is a combination circuit where R1 = 10 ohms R2 = 8 ohms and are in a series, and R3 = 20 ohms R4 = 30 ohms are in parallel.
1. Calculate total resistance.
2. Calculate current, I1
3. Calculate current, I3.
4. Calculate current, I4.
5. Calculate the voltage drop
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