working on the design of a 0.5 meter long torsion rod to be installed in a new product. The torsion rod must satisfy the performance specifications identified in Problem 3.34 and Tables E.34(a) and E.34(c). The team has evaluated the five different materials shown in Table E3.34 and has recommended that these three be further evaluated before making a final selection: (1) 4140 alloy steel, (2) aluminum alloy 24 ST4, and (3) titanium