The following engineering stress-strain data were obtained at the beginning of a tensile test for a 0.2% C plain-carbon steel. (a) Plot the engineering stress-strain curve for these data. (b) Determine the modulus of elasticity. (c) Determine the 0.2 percent offset yield stress for this steel. (d) Estimate the modulus of resilience.

\begin{tabular}{lcccc} \hline \multicolumn{1}{c}{ Element } & Atomradius(nm) & Crystalstructure & Electro-negativity & Valence \\ \hline Iron & 0.124 & BCC & 1.7 & +2,+3 \\ Nickel & 0.125 & FCC & 1.8 & +2 \\ Chromium & 0.125 & BCC & 1.6 & +2,+3,+6 \\ Molybdenum & 0.136 & BCC & 1.3 & +3,+4,+6 \\ Titanium & 0.147 & HCP & 1.3 & +2,+3,+4 \\ Manganese & 0.112 & Cubic & 1.6 & +2,+3,+6,+7 \\ \hline \end{tabular}