If the area bounded by the curve $x^2=4 y, \mathrm{X}$-axis and the line $x=4$ is divided into equal areas by the line $x=\alpha$, then the value of $\alpha$ is …

The area of smaller part between the circle $x^2+y^2=4$ and the line $x=1$ is _________ sq.units.

The area bounded by the curve $y=4 x-x^2$ and X - axis in square units, is $\qquad$

The area bounded by the parabolas $y=9 x^2, y=\frac{x^2}{16}$ and the line $y=1$ is