2. 3 charges and the observation point form a rhombus with side a , as in the figure below. The charges are q1 = 4Q (top), q2 = 3Q (left), q3 = -2Q (bottom) and the observation point (dot) is on the right. 1.5 1.0 0.6 -TO -0.5 015 10 0.6 -1.0 1.5 (a) find potential at the observation point in terms of Q and a (b) do calculations for Q = 2 AC and a = 2 mm3 charges and the observation point form a rhombus with side a=2 mm , as in the figure of problem 2 in https://web.njit.edu/~vitaly/121/potentialV.pdf => . The charges are q1 = 4Q (x=0, y=1.17 mm), q2 = 3Q (x=-1 mm, y=0), q3 = -2Q (x=0, y= -1.73 mm) with Q= 2 nc the observation point at (x= 1 mm, y=0) . Find the potential at the observation point in KV