Can someone help out with problem 35 on my homework for biomaterials?

(a) A polymer is made of the following fractional distribution. Calculate the number average molecular weight and weight average molecular weight of the polymer sample. (0.2 pt) (b) If you perform size exclusion chromatography (SEC) on the polymer, which polymer weight fraction would elute through the column first and which would elute last? (0.2 pt) (c) You have synthesized two new polymers (A \& B) using a modified protocol. Polymer A and B are made with the same monomer material but have different final molecular weights. You run polymer A and B on the SEC and obtain the following plots: Using the following standards, create the standard curve and calculate the approximate molecular weight of polymer A and B.(0.3pt)