Molecular weight data for some polymer are tabulated here. Compute (a) the number-average molecular weight, and (b) the weight-average molecular weight. (c) If it is known that this material's degree of polymerization is 710, which one of the polymers listed in Table 14.3 is this polymer? Why?

Molecular Weight Range g/mol 15,000-30,000 Wi 30,000-45,000 45,000-60,000 60,000-75,000 75,000-90,000 00,000-05,000 105,000-20,000 120,000-135,000 0.04 0.07 0.16 0.26 0.24 0.12 0.08 0.03 0.01 0.04 0.11 0.24 0.27 0.16 0.12 0.05