R is a region in the plane enclosed by the graphs off(x) = sin (Ex) and 90) = x2 2x. e. Find the volume of the solid with base R with cross sections perpendicular to the x-axis that are equilateral triangles with one side in the plane. f. Find the volume of the solid is created with circular cross sections with diameters in the plane through region R perpendicular to the x-axis. g. Find the volume of the solid with base R with cross sections perpendicular to the x-axis that are semi- circles with the diameter in the plane. h. Find the volume of the solid with base R with cross sections perpendicular to the x-axis that are quarter-circles with the radius in the plane