ii- An aluminum strut 6 ft long has a rectangular section 0.75 inch by 2 inch. A bolt through each end secures the strut so that it acts as hinged column about an axis perpendicular to the 0.75 inch dimension, and as fixed ended column about an axis perpendicular to the 2.0 in dimension. Determine the safe central load, using a factor of safety Of 1.75 and E = 10 106 psi.