Consider x} =40: 'l}sin '13: on the interval [1,'1]. a. Graph fwith a graphing utility. b. Compute and graph f'. c. Verify that the zeros off' correspond to points at which fhas a horizontal tangent line. a. Each ofthe graphs below is shown in a[1,'1,U_2] hy[2,14,2] viewing window. Which is the graph oft\"? OB. Q s; OE. or s; E? 9,6