Please write the solution process in detail, thank you!

(a) Evaluate the denite integral f ( 5X AWN / ) (If? by calculating it as a limit of a suitable Riemann sum. 0 (b) In this question, write the given sum in Sigma notation as the Riemann sum for a function and express the limit b ':m %((i+/)+(%+t)+(%+l)+ +9? + W Then evaluate the integral