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The following table lists molecular weight data for a polypropylene material

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The following table lists molecular weight data for a polypropylene material. Compute (a) the number-average molecular weight, (b) the weight-average molecular weight, and (c) the degree of polymerization. please show equations and calculations used. thank you

Molecular Weight Range (g/mol) xi wi

8,000–16,000 0.05 0.02 16,000–24,000 0.16 0.10

24,000–32,000 0.24 0.20 32,000–40,000 0.28 0.30 40,000–48,000 0.20 0.27 48,000–56,000 0.07 0.11