I need help with this FRQ. Would you please solve this question and show the way how you solved it?

No calculator is allowed on this question. (u. 0) The region R shown above is the region bounded by the curves w) = 42:2 and g(&:) = sin(1ra:). 3. Find the area of region R. b. Set up, but do not solve an integral expression for the volume of a solid whose base is region R and whose cross sections perpendicular to the w-axis are equilateral triangles. c. Let h be the vertical distance between the graphs of f and 9. Find the instantaneous rate of change of h with respect to a: when a: = l. 4