Determination of molecular weight Consider two linear polymers, such as MDPE and HDPE, which are combined to create one polymer. Assume both polymers are monodisperse, that is$,$ PDI $=1,$ and that the molecular weight of the MDPE is $100,000$ g$/$mol and that of the HDPE is $400,000$ g$/$mol$.$ Consider a mixture that is one part by weight MDPE and two parts by weight HDPE. Determine the weight and number average molecular weight and PDI for this polymer mixture.