Graph the function f(x) = x^2 - 1 over the interval [0, 2]. Partition the interval into four subintervals of equal length. Then add to your sketch the rectangles associated with the Riemann sum sum_{k=1}^4 f(c_k) delta x_k, given that c_k is the (a) left-hand endpoint, (b) right-hand endpoint, (c) midpoint of the kth subinterval.
(b) Choose the correct graph below.
(c) Choose the correct graph below.