Finding the Mid-Band Gain of a Transistor
This is a similar problem as to yours which you can refer to, and solve your question.

For the circuit below, the transistor parameters are K n = 0.5 mA/V 2 , V TN = 2V, λ = 0, C gs = .1pF, and C gd = 1pF. Determine (a) the Miller capacitance, and (b) the upper 3dB frequency of the small-signal voltage gain.