Q#2. A metal wire of 50 cm length and 1 mm radius's 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) Step 1: wire is loaded with a force of 628 N Step 2: the load in Step 1 is tripled (3 times) Step 3: the wire is unloaded 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?