Q$5$:

$[20$ Marks$]$

A tensile test specimen of stainless sted alloy having a diameter of $0\mathrm{.}495$ in $-$ and a grege length of $2\mathrm{.}00$ in$.$ was tested to fracture. Stress and strain dats obtuined during the test are shown in the figure. Determine:$($a$)$ the modulus of elasticity. $($b$)$ the proportional limit$.($c$)$ the ultimate strength. $($d$)$ the permanent strain when material stressed to $145$ ksi $.($c$)$ the fracture stress.