28. For & plane stress problem, the strain components in the x-y plane at a point P are computed as evr = Eyy = .125 x 10~2, exy = .25 x lO"2

(a) Compute the state of stress at this point if Young's modulus E = 2 x 1011 Pa and Poisson's ratio v = 0.3.

(b) What is the normal strain in the z-direction?

(c) Compute the normal strain in the direction of n = {1, 1, l}r.