I am having some trouble with these questions thank you in advance for your help

1) Using spherical coordinates, find the volume of the solid between the spheresx2+y2+z2=9 andx2+y2+z2=25

2) Suppose that C is the circlex2+y2=16 oriented counterclockwise. Findcx2+y2 ds

3) F = < 2 + x , 4 y , 9 z > is a vector field and C is the line segment from (0, 2, 3) to ( 2, 5, 1).

FindcFdr