The concrete post (E_c = 3.6 × 10? psi and ?_c = 5.5 × 10??/°F) is reinforced with six steel bars, each of 7/8-in. diameter (E_s = 29 × 10? psi and ?_s = 6.5 × 10??/°F). Determine the normal stresses induced in the steel and in the concrete by a temperature rise of 65°F.