I'm going to need help on how to find the left Riemann Sum, the Right Riemann sum, and the average of the two sums.

MAT 210 SLN 97967 = 4.7 Numerical Integration Find L, Ro, and their average for the definite integral below using the indicated value of n. 7 [ (x2 + 1 ) dx, n= 4 3 The left Riemann sum, L, is 90 . (Simplify your answer.) The right Riemann sum, R , is 130 . (Simplify your answer.) The average of the two sums is 110