The objective and eyepiece of a microscope have focal lengths of 4mm and 25mm, respectively. the objective produces a real image 30 times the size of the object. find the overall magnification of the microscope

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.