3). (15 points) Consider sin (25 - 15x³)dr. 1 We cut [0,3] into N equal pieces. In each piece [-1] we pick a random Compute the Riemann sum N SN = f(x) (x-x-1)=() N 3 k=1 where f(x)=sin(- 15³). Find N so that Sy almost equal to sin(-35)dx with an error 0.001. Give brief reasons, your answer dose NOT need to be optimal!