4. What is degree of polymerization of polystyrene having an average molecular weight of 100,000? 5. What is molecular weight of Nylon 6,6 having degree of polymerization of 100? 6. Write chemical structure for poly(butyl methacrylate) and poly(propyl acrylate). 7. Write chemical structure for poly[styrene-ran-(vinyl acetate)] having degree of polymerization equal 9 and ratio between styrene and vinyl acetate monomeric units equal 1:2.