We want to use a Riemann sum with left endpoints to approximate the value of the definite integral₃⁵ (x² - 1) dx

a) If you divide the interval[3,5] into4 sub-intervals of equal length, you get4 intervals of the form[xi,xi+1]whose union is the interval[3,5]. List the endpoints of these intervals from left to right.

b) Compute the valuet_i of each term of the Riemann sum with left endpoints and list your results from the interval the most to the left to the interval the most to the right. Give exact values.

c) Compute the value of the Riemann sum with left endpoints.