How to measure IIP3 in ADS

Hello
I am working on this circuit as a homework.
I don't know how to see the IIP3 curve in ADS.
I have 2 question while working with "IIp3 symbol":
1:How should I define "harmonic frequency indices for the fundamental frequency" for my circuit?
2:How should I define "harmonic frequency indices for the inter-modulation frequency" for my circuit?

An example in ADS help is : y = ip3_in(vOut, 22, {1, 0}, {2, -1}, 50)

{1,0} means 1*F1+0*F2 ( this the one of the fundamental components) this might also be {0,1}=0*F1+1*F2
{2,-1} means 2*F1-1*F2 ( this is the one of the Intermodulation products).It might also be {1,-2}=1*F1-2*F2

So on..