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

The area (in sq units) of the region bounded by the circle $x^2+y^2=64$, positive $X$-axis and the line $y=\sqrt{3} x$ is