In the figure four particles form a square with edge length a = 3.44 x 10"2m. The charges are q1 = q4 = 1.50 x 10-15 C and q2 = q3 = q. (a) What is q if the net electrostatic force on particle 1 is zero? (b) Is there any value of q that makes the net electrostatic force on each of the four particles zero? a 12 3 4 a a) Number 5.30e-16 Units C v b) No