2. Let f(x) = x. In this problem you will use Riemann sums to approximate On the graph below, sketch the rectangles representing the Riemann sum R, and compute this Riemann sum. (Recall that R means to use 6 sub-intervals, and to always plug the right endpoint of each sub-interval into the function.) 1 6 5 4 3 2 1 y eff 1 f(x) dx. 2 X