13. Let M be the region under the graph of fix] = E, from x = 0 to x = 5. A. Find the area of M. E. Find a value of c so that the line .1: = c divides the region M into two pieces with equal area. C. M is the base of a solid whose cross sections are semicircles whose diameter lies in the xy plane. The cross sections are perpendicular to the xaxis. Find the volume of this solid