The following function is positive and negative on the given interval. f(x)=sin 2x; 5x 2x a. Sketch the function on the given interval b. Approximate the net area bounded by the graph of f and the x-axis on the interval using a left, right, and midpoint Riemann sum with n = 4 5x C. Use the sketch in part (a) to show which intervals of 2x make positive and negative contributions to the net area. a. Choose the correct answer below. OA. Ay 1- -0 -1- NEW OB. O C. OD. 1- 1 0- 0- 3x 1- 2 2 2 HIN- 6