Q3 (20 pts) a) Two polymers are synthesized by the anionic mechanism. Sample 1 has the degree of polymerization of 100, and sample 2 has the degree of polymerization of 250. Which of them is expected to have higher polydispersity index? Explain briefly (10 pts) b) Two samples of polyethylene are synthesized by two different mechanisms. Sample 1 is synthesized by free radical polymerization, and sample 2 by anionic polymerization. Which is expected to have lower polydispersity index (PDI)? Explain briefly. (10 pts)