Graph the function f(x) over the given interval. Partition the interval into 4 subintervals of equal length. Then add to your sketch the rectangles associated with the Riemann sum f(ck) AXk , using the indicated point in the kth subinterval for ck- k=1 59) f(x) = -3x2, [0, 4], midpoint 4Fy 59) -4 X -8+ -12+ -16+ -20-+ -24+ -28+ -32+ -36-+ -40-+ -44+ -48- -52-+ -56-+ -60