$(8$ points$)$ Difficulty $(3/5)$

The following stress$-$strain curve was prepared based on a tensile test of a specimen that had a circular cross$-$section. The gage diameter of the specimen was $0\mathrm{.}5$ inches and the gage length was $2$ inches. The stress scale of the stress$-$strain diagram is given with the factor $a=10$ksi. Estimate:

$($a$)$ The modulus of elasticity.

$($b$)$ The ultimate strength.

$($c$)$ The yield strength $(0\mathrm{.}2\%$ offset$).$

$($d$)$ The percent elongation at fracture.

$($a$)E=$

$($b$){}_{\text{u}\text{l}\text{t}}=$

$($c$){}_{y_{\mathrm{.}002}}=$