An element of aluminiun in the form of a rectangular parallel pipe has a length 'a' along the x axis of 5.5 inches, a length 'b' along the y axis of 4.5 inches and a length 'c' along the z axis of 3.5 inches.The block is subjected to a stress sigma-x of 12500 psi, a stress sigma-y of -5000 psi and a stress sigma -z of 1400 psi. determine the maximum shear stress in the material,the change in length of each of the dimensions a,b and c and the change in the volume