$\backslash$table$[[,A,B,C,$Rate $($M$/$s$)],[$I$,0\mathrm{.}1,0\mathrm{.}05,0\mathrm{.}02,0\mathrm{.}2],[$II$,0\mathrm{.}2,0\mathrm{.}05,0\mathrm{.}02,0\mathrm{.}8],[$III$,0\mathrm{.}2,0\mathrm{.}15,0\mathrm{.}02,2\mathrm{.}4],[$IV$,0\mathrm{.}4,0\mathrm{.}15,0\mathrm{.}04,19\mathrm{.}2]]$

a$)$ Determine the rate law.

b$)$ Determine the overall order of the reaction.

c$)$ Determine the value of $k,$ along with units.

d$)$ What would the rate of reaction be if every concentration were $0\mathrm{.}2?$