For some transformation having kinetics that obey the Avrami equation $($Equation $11\mathrm{.}17),$ the parameter $n$ is known to

have a value of $1\mathrm{.}8.$ If$,$ after $137s,$ the reaction is $50\%$ complete, how long $($total time$)$ will it take the transformation to

go to $89\%$ completion?