Exercise 4.10 Basic amplifiers with an NPN and an NMOS transistor

The figure below shows two single transistor amplifiers.

a)

Suppose you have full freedom in choosing the supply voltage, the resistor and capacitor values, the size of the transistors (so $I_{C0}$ for the bipolar transistor), how would you dimension/bias the bipolar circuit to achieve maximum voltage gain?

b)

Suppose you have full freedom in choosing the supply voltage, the resistor and capacitor values, the size of the transistors (the $K$ of the MOSFET), etc., how would you dimension/bias the MOS circuit to achieve maximum voltage gain?

c)

Compare the maximum achievable voltage gain, assuming the same supply voltage and compare the corresponding dimensioning for the two circuits to achieve that.