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AFE4300: Calculation about Ro_ohms and Ri_ohms

Other Parts Discussed in Thread: AFE4300

Hello,

I want to calculate Ro_ohms and Ri_ohms values in I/Q mode from AFE4300 GUI results.

I know that Ro_ohms and Ri_ohms are corresponding to R0 and Rinf. Moreover, these values are Cole-cole model parameters.
But I am confused with these parameters calculation.

Maybe, should I draw the circle using Zx_mag and Zx_phase in 4 freqencies?
But I can't calculate this circule.
How do I calculate Ro_ohms and Ri_ohms?
And, Why need I values in 4 freqencies? I think I can draw circle using values in just 3 freqencies..Am I right?