Solve it in 20 min if you can't then don't solve it

POSSIBLE POINTS: 6 (1:2, A:2, C:2) Problem 3: A particle with mass m and charge q enters from the left into an uniform magnetic field that is out of page with strength B ,with a velocity v. Determine an expression for the period of this particle when it is in the magnetic field. Sketch the situation (C) and show derivation (LA) (K:1, 1:2, A:2, C:1) Problem 2: Three charged particles in the diagram are at the vertices of an isosceles triangle, where d = 2.00crn. Take q = 7.00/C. Calculate the following: A. the net force on the positive charge. B. the electrical potential at point A. 20