(a) Apply superposition theorem on the network shown in Figure Q3(a) and find thecurrent through the resistor R2. Also, prove that the superposition is not applicableon to power levels.[12 Marks]

(b) Apply the Norton's theorem to each source in the circuit as shown in Figure Q3(b)and hence reduce the circuit to a single current source and determine the Norton equivalent circuit across 'a' and 'b'. Also convert the resultant Norton equivalent-circuit to a Thevenin equivalent circuit.[13 Marks]