3.1. Consider the bar shown in Fig. P3.1. Cross-sectional area A₂ = 1 in., and Young's modulus = E 2.3 x 100 psi. If q₁ = 0.05 in. and q2 = 0.06 in., determine the following (by hand calculation): 91 1 . 92 2 x = 20 in. x1 = 15 in. *2=23 in. FIGURE P3.1 (a) the displacement at point P, (b) the strain e and stress σ, (c) the element stiffness matrix, and (d) the strain energy in the element.