sir i am stuck for this question

only need c d e

Two identical beads each have a mass m and charge q. They are placed in a hemispherical bowl of radius R with frictionless and non-conducting walls. The beads move and at equilibrium, they are a distance d apart. R (a) Consider the forces acting on the beads, express tan O in terms of m, q and d. (b) Using the answer in (a) and the expression of tand in terms of R and d, determine the charge q on each bead in terms of m, q and R. (c) If the mass m of the bead is 0.8kg, the radius R of the bowl is 3cm and the distance d is 5cm, find the charge on each bead. (d) Find the electric field at P. (e) Find the electric potential at P