Please answer all with steps :((((

1. You have a large collection of 50 nF capacitors available. Find suitable combinations of these capacitors that have the following equivalent capacitance. (Justify your answers. More than one combination is feasible in each case). (a) 400 nF; (b) 20 nF 2. A potential difference Vab = 5 volts is maintained across a system of capacitors in the gure below with C1 = 7 uF, C2 = 15 uF, C3 = 30 uF, C4 = 90 HF, and C5 = 2 HF. (a) Find the network capacitance Cab; (b) Find charges on C4 and C5; (c) Find energies stored on C1 and C2. a 02 C11 c3 c5] DM 3. In the following resistor network, find the equivalent resistance between point a and point b. R149 R::14Q 4. In the following circuit, (a) Find the magnitude and direction of the current through R2 when switch S is open; (b) Find the magnitude and direction of the current through R1 and R2 when switch is Closed. 5. In the following circuit, (a) Find the magnitude and direction of the currents through all resistors; (b) Find the potential difference Vab = Va Vb