Example 21.9 in the left and 23.11 in the right

(7) [5 points] Review Examples 21.9 and 23.11 in the textbook for a charged ring, you may use the results already derived. (3) Find the positions along x where the electric field is maxim um. (b) Graph the electric potential and electric field as a function ofx. How are these two graphs related? (c) Take the ring to have a radius of 1.0 cm and total charge +100 pC. If an electron is released at x = 00, what speed will it have when it passes through the center of the ring