A plastic cube with a 4 in. * 4 in. * 4 in. is placed in a pressure chamber and subjected to a pressure of 15,000 psi. If the modulus of elasticity is 1000 ksi and Poisson’s ratio is 0.49, what will be the decrease in each side of the block,assuming that the material remains within the linear elastic region? What will be the decrease in the volume of the cube?