Problem 2 (15 points) If 200g of Polymer A, 300 g of polymer B, 500 g polymer C, and 100 g D are mixed, calculate both Mn and Mw of the blend. Mn =45,000; Mw=65,000 Mn = 100,000; Mw = 200,000 Mn=80,000; Mw=85,000 Mn =300,000: Mw = 900,000 What is the polydispersity index