Three point charges are at the corners of an equilateral triangle of side length 50 cm, as shown in the figure. 9 B a. If qA =1.70 HC, qB =6.90 JC, and qc =-4.50 JC, determine the net electric force on the charge qA. (EFA = (0.371 N)i - (0.3653 N)j or 0.371 N @ 80 below the +x-axis) 50 cm b. If qA =8.00 nC UC, qB =3.00 nC, and qc =-5.00 nC, calculate the net electric field on the x-axis, at the point midway between the charges qA and qc. - - (EE = (1869.92 N/C)i - (143.85 N/C)j or 1875.44 N/C @ 4.4 below the +x-axis) + 9c