Electrostatics

A rigid insulated wire frame in the form of a right angle triangle,ABC is set in a vertical plane as shown in figure.Two beads of equal masses m and carrying charges q₁ and q₂ are connected by a cord of lenght l and can slide on the wire without friction.Considering the case when the beads are stationary:determin(
(A) the angle APQ
(B)the tension in the cord
(C)the normal reactions on the beads
(D)If the cord is now cut,what are values of the charges for which the beads continue to remain stationary.