5) The bar shown has a circular cross section with a 0.002 m diameter and its modulus of elasticity is E = 86.6 GPa. It is subjected to a uniformly distributed axial force of q =75 kN/m and an axial force of F 15 kN. a. Calculate the axial force P in the bar as a function of x. b. Calculate the bar's total change in length. c. Calculate the reaction force at the fixed end. q L= 0.8 m F