If Rx 3 cos x 0 x Find the width of each subinterval 2 Find the left endpoints of the subintervals where x x x6 x 4 x units x6 evaluate the left Riemann sum with n 6 taking the sample points to be left endpoints Evaluate the Riemann sum Round your answer to six decimal places What does the Riemann sum represent The Riemann sum represents the net area of the rectangles with respect to the Select V Illustrate with a diagram 3x MA CO 4 00 8 X 4 3A 8