Graph the function f(x) = x" - 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 4 Riemann sum _ f(Ck ) Axk, given that ck is the (a) left-hand endpoint, (b) right-hand endpoint, (c) midpoint of the kth subinterval. K = 1 . . . (a) Choose the correct graph below. O A. O B. O c. OD. 4 7y 4 1Y X X X X O (b) Choose the correct graph below. O A. O B. O c. OD. Ay 2- 41y X X X X