$(4$ points$).$ Find the volume generated by rotating the region bounded by curves $y=sinx\sqrt[\phantom{2}]{sinx}$ and $y=x-x^2$ about the $x-$axis. Show steps:

a$.(1$ point$)$ Graph the region,

b$.(1$ point$)$ Show the solid,

c$.(1$ points$)$ Set up an integral, and

d$.(1$ points$)$ Evaluate the integral.