3. Four charges (Q1 = = 10.0 C, Q2 = -5.0 C, Q3 = -15 C, and Q4 20.0 C) are at the corners of square with length 0.6 m. Find the electric potential at Q1 (20 points) Q3 4. (a) Determine the equivalent capacitance of the circuit. C1= 3.0 F, C2 = 6.0 F, C3 = 10.0 F, C4 = 4.0 F, C5 = 6.0 F V = 12 V. (b) How much charge is stored on each capacitor? (c) How much energy is stored on capacitor C3? (25 points). C1 C3 V C4 004 C5