Q#2. A metal wire of 50 cm length and 1 mm radius is exposed to a sequence of loading and unloading steps as described below. The stress-strain data for the metal is given in Figure 1. (5 points) a) What is the total length of the wire in Step 1. b) What is the total length in Step 2? c) What is the total length in Step 3? d) What is the final yield strength?