A $50$ gram sample of polymer was fractionated into $6$ samples of different molecular

weights given in the Table below. The viscosity average molecular weight, Mv$,$ of

each was measured and is included in the Table. Estimate the Mn$,$ Mw$,$ and Mz of

the original sample. For your calculations assume that each fraction measured by Mv

is extremely narrow and is monodisperse. Would you classify the molecular weight

distribution of the original sample as narrow or broad?