Concentration$-$time data $($shown below$)$ for the reaction $A2B$ was measured in a constant volume batch reactor. Find the reaction order, $,$ and the reaction rate constant, $k.$

$\backslash$table$[[t(min),0,1,3,5,10,20,40,100],[C_A(mo\frac{l}{L}),7\mathrm{.}59,6\mathrm{.}58,5\mathrm{.}35,4\mathrm{.}34,3\mathrm{.}11,1\mathrm{.}84,1\mathrm{.}19,0\mathrm{.}47]]$

$($a$)$ Use the integral method

$($b$)$ Use the differential method.