A solid circular aluminum $(\backslash (\backslash$mathrm$\{$G$\}=4\backslash$mathrm$\{$Msi$\}\backslash ))$ shaft with diameters of $2\mathrm{.}5$ in $.$ and $1\mathrm{.}75$ in $.$ is subjected to torque T $,$ as shown in the figure. If the maximum allowable twist in the shaft over the entire $7-$ft$.$ length is $0\mathrm{.}06$ rad, determine the maximum allowable value of torque, T$.$ Answer in units of kilo$-$pound inches $($kip$.$in$)$ to two decimal places.