$($a$)$ Plot the stress$-$strain curve and label the following:

proportional limit$,$ modulus of elasticity $($which is the slope of the initial part of the stress$-$strain curve$),$

and the yield stress at $0\mathrm{.}2\%$ offset.

Plot the stress$-$strain curve using Excel and attach below; $[$DO NOT draw the curve freehand$]$