A support cable in a structure must be 5 m long and must withstand a tensile load of 5 kN with a safety factor of 2.0 against tensile failure. Assuming a solid cylindrical cross section for the cable as an approximation (a) determine and compare the weights of cables made of 4340 steel and AS-4 carbon fibers that meet the above requirements and (b) for an AS-4 carbon fiber cable having the same weight, length, and safety factor as the 4340 steel cable from part (a), how much tensile load will the carbon fiber cable be able to withstand?