Question 5: The density and associated percent crystallinity for two polypropylene materials are as follows: a. Determine the percent crystallinity of a polypropylene specimen having the density of 0.918g/cm3. b. Based on the percent crystallinity calculated above, choose one of the following schematics that best represent the arrangement of molecular chains in above specimen. Justify your answer in one or two sentences. c. How might I decrease the crystallinity of the polymer