1. Let X and Y be continuous with a joint pdffxy(xy) = 15xy^2 if 0<x<1 0<y<1 0<y<x 0 otherwiseLet T = X-Y U= X/Y. Find the joint density of T and U.2.The length of time that a certain machine operates without failure is denoted by X1 and the length

1. Let X and Y be continuous with a joint pdffxy(xy) = 15xy^2 if 0