Please solve everything with steps :(((

1. In the following circuit, the capacitance for C1 is 6.9 pF, and that for C2 is 4.6 ,uF. (a) Find the equivalent capacitance of the network between a and b; (b) When Val, = 420V, find the charge on the C2 capacitor between c andd. c1 c1 c1 cw: C2 C2 C1 b FLIFHJ d C1 C1 C1 2. In the following circuit, (a) Find the potential of point a with respect to point 1), Wm = V - Vb; (b) When points a and b are connected with a wire, find the direction and magnitude of the current owing through the 12-V battery. 3. In the following circuit, find the power dissipated in the 40-0 resistor between point a and point b