Consider the spring system shown in Figure 4A. The following information is provided: the cantilever beam is 10 feet long, has an E of 29000 ksi, an A of 10 in2 and an I of 2000 in4; the beam has a stiffness to resist bending of 50 kips/inch; the hanger is 5 feet long, has an E of 1000000 psi and is a rectangular cross-section 1.5 inch wide by 3.5 inch deep; and the spring is known to require a force of 120 kips to make it stretch 3 inches. Determine the equivalent spring stiffness (kip/inch) of the entire system. 4. The spring system of Problem 3 above supports a weight of 300 kips. Determine the period of vibration of the system. 5. In Problem 3 you were told that the beam has a stiffness of 50 kips/inch. If the actual beam is 20 feet long and has an E of 29000 ksi, determine the value of I that the beam must have