$($Total: $60$ points$)$ The isothermal reaction $AB+C$ was carried out and the following data recorded. Assuming the entering molar flow rate of A was $30mo\frac{l}{m}in.$ Answer the following questions. Please answer the next $4$ questions.

$\backslash$table$[[x,0,0\mathrm{.}1,0\mathrm{.}2,0\mathrm{.}4,0\mathrm{.}6,0\mathrm{.}7,0\mathrm{.}8],[\backslash$table$[[-r_A$