$14\mathrm{.}4$ The following table lists molecular weight data for a polytetrafluoroethylene material. Compute the following:

$($a$)$ the number$-$average molecular weight

$($b$)$ the weight$-$average molecular weight

$($c$)$ the degree of polymerization

$\backslash$table$[[\backslash$table$[[$Molecular Weighe$],[$Range mol