Page 4 of 6 3. (25 pts) The engineering stress-strain curve for a given metal can be well described by three straight lines, with stress or given in MPa and strain ɛ in units of m/m. Elastic range: Plastic range: and for 0< < 0.0025 =138 x10' x -328 +1.08 x10' xe for 0.0025<<0.1 -1,725-6.9 x 10' xɛ for 0.1 <<0.15. a. What is the value of modulus of elasticity? b. What is the value of the yield stress? c. What is the value of the ultimate tensile stress? d. Calculate a value for the modulus of resilience. e. Calculate a value for the toughness. f. What is the percentage elongation?