A solid sphere of mass M$=2$kg and radius R$=0\mathrm{.}1$m is initially at rest at the top of a ramp of height $=$H$=1\mathrm{.}1$m and angle $=30.$ The sphere released and rolls without slipping to the bottom of the ramp. It takes t$=1\mathrm{.}12$s for the sphere to roll to the bottom of the ramp. What is the net torque acting on the sphere as it rolls down the ramp? Define clockwise as positive.