A ${10}^{\text{'}\text{'}}{4}^{\text{'}\text{'}}$ aluminum block that is $0\mathrm{.}5"$ thick is loaded with the forces shown below. The forces are applied to the block using rigid plates that uniformly distribute each force over the entire side of the block

Note: assume these rigid plates do not interfere with each other or the deformation of the block.

Calculate the change in thickness of the block due to the applied loads and state whether the thickness increases or decreases. $[$Aluminum properties: Modulus of Elasticity $=10{10}^6,$ Modulus of Rigidity $=4{10}^6$ psi., Poisson's Ratio $[$:$=0\mathrm{.}30$