Find the volume of the following solids. The base of a solid is the region between the curve y = 4 1sin x and the interval [0,x] on the x-axis. The cross-sections perpendicular to the x-axis are a. equilateral triangles with bases running from the x-axis to the curve as shown in the figure. y = 4v sin x b. squares with bases running from the x-axis to the curve. a. V= (Type an exact answer, using radicals as needed.) b. V =(Type an exact answer, using radicals as needed.)