Q.3 Below are the graphs of the molecular weight for two biopolymers. 0.5 0.5 0.4 Number fraction 0.3 Number fraction 0.3 oo 0.2 0.2 0.1 Molecular weight (x10 g/mol) Molecular weight (x10 g/mol) 3 0.1 g 5 10 15 5 10 15 a) What are the number and weight average molecular weights for both polymers? (2 marks for MN, 4 marks for Mw) b) The two graphs are actually for the same polymer, but the one on the right is after the polymer has been left in the lab for two weeks. What may have happened to this polymer to increase its molecular weight? (2 mark)