Strain gages on the outer surface of a pressure vessel read e(l)=0.002 in the longitudinal direction and e(t)=0.005 in the circumferential direction. Compute the stresses in these two principal directions: E = 207GPa and Poisson's ratio v = 0.3. What is the error in the Poisson effect is not taken into consideration? (Note: Assume thin walled cylindrical pressure vessel. Also, do not calculate error if the posson's effect is neglected)