A circular disk of radius R meter and mass M kg is rotating around the axis perpendicular to the disk. An external torque is applied to the disk such that $$\theta (t)=5t^{2}-8t$$, where $$\theta (t)$$ is the angular position of the rotating disc as a function of time t. How much power is delivered by the applied torque, when t = 2 s ?

A

72$$MR^{2}$$

B

8$$MR^{2}$$

C

108$$MR^{2}$$

D

60$$MR^{2}$$