4) Using the principle of superposition, find the voltage V in the circuit shown in Fig. 4. Find the power dissipated in the 20 2 resistor. Is it possible to find the power in a circuit element using the superposition principle (i.e., by adding the power associated with that element due to each independent source acting alone)? Justify your answer. 6A 75VO ww 50 ww ΘΩ + V 200 120