Help Finding Amplitude of Voltage Across Capacitor At Resonant Frequency

Hi, here is the question:

For part b) I have to find the amplitude of Vc at the resonant frequency with I=1A, I have found Zeq and well here are my equations:

$$\frac{jwL+R}{\ jwRC-w^2LC+1}$$ and I have the equation for w at the resonance:w= $$\sqrt[2]{\frac{L-R^2C}{\L^2C}}$$

I know at the resonant the impedance is real..but I don't know what to do with my equations, can someone help please.