a. Use Riemann sums to find an upper bound and a lower bound for ∫ 0

−2 t

3 dt. How would you refine these estimates

(i.e., make the upper bound closer to the lower bound so that you get a better estimate for the actual area)?

b. How would you use Riemann sums to find upper and lower bounds for ∫ 1

−1 s

2 ds?