# How to design an amplifier to meet particular specifications

I need to specify the (W/L) ratio of transistors and the value of the current source in an amplifier as shown in this picture

so that these specifications are met:

*the height of the input step for evaluating settling time is 0.25v.

I tried to approach it by first using the settling time to evaluate slew rate and wt and then using the approximation of wt = wp*gain but didn't succeed.