Can you please explain these questions how to solve Thanks in advance

Isn't the force equation should be F = kq1q2/r^2 ? and then sum for the each force acting based on the charge based on the direction?

Please let me know how to solve these problems.

Can you also draw the direction of it like a vector that might be helpful for understanding

Three Charges are arranged as shown, 2 meters apart from each other. All charges are 1C in magnitude, with the signs shown. 2m 2m 4.- 4} 1 c 1 C -1 C 3) The magnitude of the net force on the middle charge is a. Zero b. 4.51:109 N c. 2.3):10' N d. 2.8):109 N e. 1.7):109 N 4] The potential energy of this arrangement of charges is a. Zero b. 4.51:109 J c. -2.3x1091 d. 1.1):101\"J e. -6.8x109.l Three Charges are arranged as shown, 2 meters apart from each other. All charges are 1C in magnitude, with the signs shown. 2m 2m 1. 4D 1 c 1 C -1 C 3} The magnitude of the net force on the positive charge on the left is a. Zero b. 5.6):10' N c. 2.3::109 N d. 2.8):109 N e. 1.7):109 N 4) The magnitude of the net force on the negative charge is a. Zero b. 5.6::10' N c. 2.33:1(1g N d. 2.8):109 N e. 1.7):109 N