Two masses hang initially at rest suspended on either side of a $3$ kg pully of radius $0\mathrm{.}2$ meters. When the masses are allowed to move the mass on the right begins to move downward with an acceleration of $1\mathrm{.}2$ m$/$s$2.($a$)$ What is the total torque $($including sign$)$ felt by the pully? $($b$)$ Which object has the greater mass?