A 70% Cu-30% Zn brass wire is cold-drawn 20 percent to a diameter of 2.80 mm. The wire is then further cold-drawn to a diameter of 2.45 mm. (a) Calculate the total percent cold work that the wire undergoes. (b) Estimate the wire's tensile and yield strengths and elongation. If it takes 12.0 min to 50% recrystallize a piece of high-purity copper sheet at 140C and 200 min at 88C. how many minutes are required to recrystallize the sheet 50% percent at 100C? Assume an Arrhenius-type rate behavior.