At a temperature of 60°f, a 0.04in gap exists between the ends of the two bars. bar (1) is an aluminum alloy with e = 10,000ksi, ν = 0.32, α = 12.5×10-6/°f, a width of 3in and a thickness of 0.75in. bar (2) is made from stainless steel with e = 28,000ksi, α = 9.6×10-6 /°f, ν = 0.12, a width of 2in and a thickness of 0.75in. the supports at a and c are rigid. determine: (a) lowest temperature at which the two bars contact each other. (b) normal stress in the two bars at a temperature of 250°f. (c) normal strain in the two bars at 250°f. (d) change in width of the aluminum bar at a temperature of 250°f.