Question

So I have the following information:

Amplitude (A)=1.60mm, Angular Velocity (w)=2760 and phase constant (o) = pi/2.

and I need to find:
a)the period of oscillation.
b)maximum speed.
c)max magnitude of acceleration.

Firstly I dont want anyone to give away the answers explicitly but tell me if im on the right track please.

I have started with finding the frequency which I worked out using some rearrangement to be:

w=2pi*f (2760=2pi*f) so f=1380/pi =439

Then I went on to the period which I hope is:

w=2pi/T (2760=2pi/T) so T=pi/1380 = 0.002.

Am I anywhere near being on the right track?

Thanks!