Question A5: A cylindrical metal pull-rod, with a diameter of 20mm and a length of 1m, is subjected to a force parallel to its length at a temperature of 700C. The creep rate of the metal at 700C is given by ss=8.210154s1 where is the applied stress in MPa. The rod length is not allowed to exceed Xm after Y hours. The values of X and Y are sbecific to vour URN number accordina to the following: (a) Assuming steady-state creep applies, what was the maximum force that can be applied to the rod? Please provide necessary solution steps. [4 marks] (b) Discuss in general why creep is a problem, and how to minimize the elongation of the bar when the operation temperature must be at 700C ? [4 marks]