Determine values for the constants n and k (Equation 10.17) for the crystallization of polypropylene (Figure 15.17) at 160 C. Part 1 Using the data given in Figure 15.17 at 160C, find the time needed for 20%(y1=0.20) of polypropylene to crystallize, in minutes. minutes Attempts: 0 of 3 used Part 2 Using the data given in Figure 15.17 at 160C, find the time needed for 80%(y2=0.80) of polypropylene to crystallize, in minutes. minutes Attempts: 0 of 3 used Part 3 Using the two arbitrary data points from the previous two steps, calculate n in Equation 10.17. Using the two arbitrary data points from the previous two steps, calculate k in Equation 10.17