Q$2)$ A steel bar $16mm$ diameter and $102mm$ gage length was axially stretched to obtain the following stress$-$strain diagram, Determine:

a$)$ The initial tangent modulus, $E_{it}$

b$)$ Yield strength by $0\mathrm{.}2\%$ off$-$set method

c$)$ Ultimate Strength

d$)$ Ultimate Strain

e$)$ Stain at fracture

f$)$ Modulus of Resilience and Toughness of this material