[Urgent] Please help me out to solve this problem. You actually can skip writing down explanations, but equations, units and answer are required.

1. There are 5 negative charges arranged at the corners of a pentagon. The sides of the pentagon have a length of a, and the charge of each individual particle is q. (a) (1 point) Draw a point at the very center of the square and label it with the capital letter S. (b) (4 points) What is the net electric eld at the center? Explain your reasoning. (c) (4 points) If you carefully placed a charge 5q at point S, would this new charge accelerate? ) (d (1 point) Draw a point at the middle of one of the ve sides of the pentagon. Label it with the capital letter M. (e) (15 points) Compute the direction and magnitude of the net electric eld at point M. Express your answer in terms of a, and