Wheel accelerated by a motor

A motor applies a constant torque of $12\mathrm{N}\cdot \mathrm{m}$ to a wheel, initially at rest, with moment of inertia $0.80\mathrm{kg}\cdot {\mathrm{m}}^2$ about the axis; friction is negligible. Compute, after $4.0\mathrm{s}$, the angular velocity, the kinetic energy of the wheel and the power delivered by the motor at that instant.