For isosceles trapezoid CIEO, CO = IE, N is the midpoint of CO, and M is the midpoint of IE. Also, CI = (4a - b), NM = (15a + 14b), OF = (13a + 10b), NO = (23a + 28b), and IM = (a - 4b + 2). [Draw a picture to help.] 8a. What is the value of a in this situation? 9 points Your answer 8b. What is the value of b in this situation? 9 points Your answer 8c. What is the value of NM? 7 points Your answer 8d. What is the perimeter of CIEO? 15 points Your