Four point charges are positioned as shown in the graph below. The grid scale represents distance, in centimeters. Charges A, B, and C are fixed in position. g, =+3.4x10C s =+2.5x10 C q.=-1.6x10C a) Determine the net electric field strength of a positive test charge located at point D. b} If the test charge at point D has a charge of 5.8x10C and a mass of 3.8x10 kg, what is its acceleration as it is released from its starting position