4. In the rectangle in the drawing, a charge @ is to be placed at the empty corner to make the net force on charge A point in the horizontal direction. Find the following if qi = 1.5 pC, 92 = 3.0 MC, and 93 = -2.00 MC. (a) The force diagram of the charge at A (b) The algebraic sign of the missing charge, Q (c) The magnitude of the missing charge, Q (d) Find the magnitude of the force on the charge at A ? (e) Find the direction of the force on the charge at A 9 2 5d 84 V ( 2 2 ) 2 + ( 5 2)2 = C 5:385 d 2d 42 2 + 252 2 V 29 07 91 9 3 F1yl 5 , 38 5d sing = ad 7 F13 5, 3852 Sing = 3.7139