1)Find the volume of the solid obtained by rotating the region bounded by the graphs y=x^2, the x-axis, x=14 about =14

2)Find the volume V of the solid obtained by rotating the region bounded by the graphs,y=11x ,y=x3, and x0 about thex-axis.

3)Use the disk method to find the volume of the solid of revolution generated by revolving the region bounded by the graphs of y=3e^(x), the x-axis, x=0, and x=7 about the x-axis.

please with thorough detailed explanation.