Find the propagation delay for a minimum-size inverter for which
Kn' = 3 Kp' = 180 uA/V^2 , and (W/L)n = (W/L)p = 0.75 um/0.5 um , VDD = 3.3 V , Vtn = -Vtp = 0.7 V, and the capacitance is roughly 2 fF/um of device width plus 1 Ff/device.
What does tp become if the design is changed to a matched one? Use the method of average current.