Please i need answers to the questions below on harmonic analysis with ETAP:

1 In the editor window, what informs the choice of harmonics model?
I see in the dropdown list several options - 12pulse, 6 pulse etc. how do you determine which choice is right seeing that each choice gives different values for the same system

2. Also, harmonic filter sizing window, we have load MVA, now if i have say two or more loads giving me harmonics, how do i fill in the value here?

3 Furthermore, in the sizing window , you are required to fill in a quality(Q)factor. how do you determine this value and what is the range?

Thank you.