Ahelical compression spring is to be cycled between 150 lbf and 300 lbf with a 1-in stroke. the number of cycles is low, so fatigue is not an issue. the coil must fit in a 2.1-in diameter hole with a 0.1-in clearance all the way around the spring. use unpeened oil tempered wire with squared and ground ends. (a) determine a suitable wire diameter, using a spring index of c 5 7. (b) determine a suitable mean coil diameter. (c) determine the necessary spring constant. (d) determine a suitable total number of coils. (e) determine the necessary free length so that if the spring were compressed to its solid length, there would be no yielding.