The first$-$order thermal decomposition of clorocyclohexane is as follows: C$6$H$11$Cl $($gas$)->$ C$6$H$10($gas$)+$ HCl $($gas$)...$ For a constant volume system the following total pressure was measured as a function of time: Time $($t in minutes$)$ Total pressure $($P in Torr$)$

$0220\mathrm{.}0$

$3238\mathrm{.}9$

$6256\mathrm{.}2$

$9272\mathrm{.}1$

$12286\mathrm{.}5$

$15299\mathrm{.}7$

$18311\mathrm{.}8$

$21322\mathrm{.}8$

$24332\mathrm{.}9...$ a$)$ What is the reaction rateconstant?;

b$)$ What is the decay time $($lifetime$)$ of clorocyclohexane?; c$)$ How long does It take for clorocyclohexane to decompose $80\%$ of its initial value?