1. Find the volume of the solid whose base is the region bounded between the curve x=1-y^2 and the y axis and whose cross section taken perpendicular to the y axis and squares

2. Find the volume of the solid that results when the region enclosed by the given curves is revolved about the x-axis:- Y= e^x, y=0, x=0, x=ln3

3. Find the volume of the solid that results when the region enclosed by the given curves is revolved about the x-axis :- Y=e^(-2x), y=0, x=0, x=1

4. Find the volume of the solid that results when the region enclosed by the given curves is revolved about the x-axis :- Y=1/sqrt (4+x^2), x=2, x=-2, y=0

5. Find the volume of the solid that results when the region enclosed by the given curves is revolved about the x-axis :- Y=e^(3x)/sqrt(1+e^(6x)), x=0, x=1, y=0

6. Find the volume of the solid whose base is the region bounded between the curve y=x^3 and the y axis from y=0 to y=1 and whose cross sections taken perpendicular to the y axis and squares

I need the answers to these questions. Thanks!