In order to solve this problem, use the following equations and steps shown: \begin{align} &\cssId{Step1}{E = \frac{σ_{e}}{ε} }\\[3px] &\cssId{Step2}{E = \frac{69}{0.001}}\\[3px] &\cssId{Step3}{E = \frac{138}{0.002}}\\[3px] &\cssId{Step4}{E = 69000 MPa }\\[3px] \end{align}