The area of the region (in sq units) enclosed by the curves $y=8 x^{3}-1, y=0, x=-1$ and $x=1$ is

If the area of the region enclosed by the curve $a y=x^{2}$ and the line $x+y=2 a$ is $k a^{2}$, then $k=$

The area of the region enclosed by the curves $y^2=4(x+1)$ and $y^2=5(x-4)$ is

Area of the region enclosed between the curves $y^2=4(x+7)$ and $y^2=5(2-x)$ is