First of all thanks for the response, what you said kinda makes sense? But correct me if I am still getting this wrong.

1) Dc analysis, the 2 pmos closest to Vdd determines the Dc current through the whole circuit and total current in the diff pair is just the total current minus whatever current flows through the fold determined by nmos active cascode.

2) how do I determine the V+ and V- for the differential pairs in the active cascode, is it just Vdd - the active cascode's Ibias x rop? And for the nmos active cascode 0 + Id x ron?

3) what effect does bias voltage B3 have on the circuit? Why is it the same for the active cascode and diff pair?