PROBLEM $1(40$ marks$)$

The A$36$ stainless steel strut A has a diameter of $d=2in.$ and is surrounded by a red brass C $83400$ tube B$.$ Both rest on a rigid surface. Having a slippery bond between the two material, a$)$ If a force of $5$ kip is applied to the rigid cap, determine the average normal stress developed in the strut and the tube. Given the elastic modulus of A$36$ stainless steel $29{10}^6$ Psi and red brass $17{10}^6$ Psi.