Consider the circuit shown in Fig. 19-71, where all resistors have the same resistance R. At t = 0, with the capacitor C uncharged, the switch is closed.

(a) At t = 0, the three currents can be determined by analyzing a simpler, but equivalent, circuit. Draw this simpler circuit and use it to find the values of I1, I2, and I3 at t = 0.

(b) At t = ∞, the currents can be determined by analyzing a simpler, equivalent circuit. Draw this simpler circuit and implement it in finding the values of I1, I2, and I3 at t = ∞.

(c) At t = ∞, what is the potential difference across the capacitor?

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