$q,$ Problem $1q,$ An applied constant torque decreases the angular momentum of a flywheel of rotational inertia of $2\mathrm{.}7kg*m^2$ from $65$ to $21kg*\frac{m^2}{s}($both CCW$)$ in $1\mathrm{.}9$ s $.$

What was the angular acceleration $$ of the wheel over the $1\mathrm{.}9$ s $?$

Through what angle did the flywheel rotate?