Determine whether or not the vector field is conservative. If it is conservative, find a function f such that F = VF. (If the vector field is not conservative, enter DNE.) F(x, y, z) = y cos(xy)i + x cos(xy)j - 9 sin(z)k​

Apyramid fits exactly inside a cube. the cube and the pyramid share the same square base, and they are both exactly the same height. the volume of the cube is 66 cubic inches. what is the volume of the pyramid? explain your answer. answer asap