The base of a solid is the region in the first quadrant bounded by the line x+2y=4 and the coordinate axes. What is the volume of the solid if every cross section perpendicular to the x-axis is a semicircle? (п = pie)

A. 64п/3

B. 32п/3

C. 8п/3

D. 4п/3

E. 2п/3

thanks!