The $60-$mm$-$diameter shaft is made of $6061-$T$6$ aluminum.

$($Figure $1)$

Part A

If the allowable shear stress is ${}_{\text{a}\text{l}\text{l}\text{o}\text{w}}=80$MPa, and the angle of twist of disk A relative to disk $C$ is limited so that it does not exceed $0\mathrm{.}070$ rad $,$

determine the maximum allowable torque $T$

Express your answer to three significant figures and include the appropriate units.

$T=$

Figure