Can you please help me find the Left Riemann and the Right Riemann as well as the average of the two ... I don't know if I got these right

Find L, R, and their average for the definite integral below using the indicated value of n. 5 ( x2 + 1 ) dx, n = 4 The left Riemann sum, L, is 93 . (Simplify your answer.) The right Riemann sum, R,, is 121 . (Simplify your answer.) The average of the two sums is 107