Physics Question- Rotational Kinetic Energy?

1. Calculate the rotational kinetic energy in the motorcycle wheel (figure below) if its angular velocity is 98 rad/s. The mass of the wheel is 10.6 kg and assume it to be a approximately an annular ring with an inner radius of 0.330 m and an outer radius of 0.380 m.

I am so confused, someone please help me.
Thanks

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