Rubber disks are used to provide cushioning for equipment subjected to vibrations. The vibration analysis indicates that the rubber disk should provide an effective spring constant of 600 lb/in. Spacing considerations dictate that the disk should be 0.5 intall. Take the rubber to have a Modulus of Elasticity of 400 psi. (a) Determine the desired diameter of the disk. (b) If the rubber strain is not to exceed 0.2 in/in, determine the maximum allowable compressive force. Recall that the spring constant, k=Fx,or in terms of an axially loaded member