1. Let f (x) = 1 -x2. (a) (8 points) Compute the left-hand Riemann sum approximation of So f (x) dx with n = 3 boxes. (b) (8 points) Compute the right-hand Riemann sum approximation of So f (x) da with n = 3 boxes. (c) (8 points) Express fo f (x) dx as a limit of right-hand Riemann sums (as in the definition of the definite integral). Do not evaluate the limit