I am really lost.

1.) Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis.

y=8 x^2, x = 1, y = 0, about the x-axis

2.) Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis.

y=x^2, y = 0, x = 3, about the y-axis

3.) Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis.

y = 28 x - 4 x^2, y = 0;

about the y-axis

Kiba