Here are design parameters that should work for the simulation of

Here are design parameters that should work for the simulation of
homework4

W/L in 216
W/L tail 28
W/L fold 28.4
W/L mirror 35.6
W/L cascode for mirror 35.6
W/L cascode for fold 14.2
W/L nbias 2.13
W/L pbias 2.1
Rnbias 25kOhm
Rpbias 10kOhm (because vontail is 400mV and vonmirror is 250mV we need
2*250mV-400mV = 100mV across this resistor)

Itail should be 133uA (check in your sims)