$($a$)$ Draw the engineering stress$-$strain diagram for a metallic material with FCC structure.

Describe in detail which properties of the material can be determined from the tensile test, and

show these properties on the diagram.

$($b$)$ How do the following parameters affect the strength values obtained from the tensile test?

$($i$)$ High temperature.

$($ii$)$ High deformation $($tensile$)$ rate.