What is the direction of the magnetic field at the position marked by the x?

(a) left
(b) right
(c) into the screen
(d) out of the screen

Uppose we consider the system of the three capacitors as a single "equivalent" capacitor. given the charges of the three individual capacitors calculated in the previous part, find the total charge qtot for this equivalent capacitor. express your answer in terms of v and c.