Consider the bar shown in Fig. P3.1. Cross-sectional area A₂ = 1.2 in., and Young's modu- lus E 30 x10 psi. If q₁ = 0.02 in. and q = 0.025 in., determine the following (by hand calculation): 91 92 + X 1 2 x 20 in. x₁ = 15 in. X223 in. FIGURE P3.1 (a) the displacement at point P, (b) the strain and stress σ, (c) the element stiffness matrix, and (d) the strain energy in the element.