pls help. To confirm, is the answer for number one C or D or neither? I want to know if im on the right track

Question 2: Two equal but opposite charges to are shown in the figure. What is the electric potential at the dot? A) V = +Kq/ (4a) B) V = +Kq/ (5a) C) V = -Kq/ (20 a) 4 a D) V = - Kq/a 3 aQuestion 4: The figure provided shows an electron that is released from rest at x = 2 m. Which of the following best describes the electron's motion? V (V) A) The electron moves to the left. 100 B) The electron moves to the right. C) The electron does not move. O x (m) 2 3 -100Question 1: Rank in order, from largest to smallest, the potential V. A) Va Vb > Vc C) Va = Vb > Vc D) Va = Vb