Can someone please explain it to me ASAP?!!! This is Volume by Slicing!!

Use the general slicing method to nd the volume of the following solid The solid whose base is the triangle with vertices (0,0). (16,0). and (0.16) and whose cross sections perpendicular to the base and parallel to the y-axis are semicircles Set up the integral that gives the volume of the solid. Use increasing limits of integration. Select the correct choice below and ll in the answer boxes to complete your choice. (Type exact answers.) 0A Edx OB. Edy