Use the Force (20 points The figure displays a configuration of fixed point charges, 4 71. Q2, and of that form an equilateral triangle with sides of length a = 30 cm. q1 has a charge of +3.0 C, q, has a charge of +3.0pC, and q, has a charge of +4.0 C. a a X + 2 42 a + (a) (12 pts) What is the magnitude and direction of the net electric field at the point midway between charges 1 and 2? Be sure to indicate a direction using a defined coordinate system. (b) (8 pts) Suppose a proton were placed at the midpoint between charges 1 and 2. What would be the magnitude and direction of the net force acting on the proton? (c) (4 pts) What is the magnitude of the instantaneous acceleration of the proton at the midpoint between charges 1 and 2 if released from rest? (d) (4 pts) Suppose the proton travels a distance of 50 cm. Will the magnitude of the acceleration of the proton be greater than, less than, or equal to the value you calculated