Please answer multiple choice and show work

Question 7: (1 point) Given the graph below, use 9 rectangles to find an estimate for the area under the graph from x - 0 to x - 9. Find the lower and upper estimates for the area. 10 6-- 4+ 2+ 0 1 2 3 4 5 6 7 8 9 10 X (a) Lower = 56.7 and Upper = 66.7 (b) Lower = 54.7 and Upper = 68.7 (c) Lower = 55.7 and Upper = 62.7 (d) Lower = 52.7 and Upper = 64.7 (e) Lower = 59.7 and Upper = 67.7