The area (in sq. units) of the region $$\mathrm{A}=\left\{(x, y) / \frac{y^2}{2} \leq x \leq y+4\right\}$$ is

The area (in sq. units) of the region described by $$A=\left\{(x, y) / x^2+y^2 \leq 1\right.$$ and $$\left.y^2 \leq 1-x\right\}$$ is

The area of the region bounded by the curve $$y=2 x-x^2$$ and X-axis is

Area bounded by the lines $$y=x, x=-1, x=2$$ and the $$X$$-axis is