1. Which of the following relationships must be true according to the laws of series and parallel connections? The options are: I1 = I3 I3 = I4 I2 = I3 + I4 I1 = I3 + I2 V1 = V2 V3 = V4 V1 = V3 + V4 V2 = V3 + V4 V1 = V2 + V3 + V4 2. Loop and junction laws 3. By the junction law, I said that I1 = I3, I3 = I4, and I2 = I3 + I4. That's wrong, and I suspect that it's wrong because one or more of the options involving the potential drops is correct. But I don't understand why any of those would be true if the potential drops across each resistor in the direction of current flow.