6. (15%) A MOS differential pair operated at a bias current of 0.8mA employs transistors withW/L=100 and μnCox=0.2mA/V2, using RD=5kΩ, and RSS=25 kΩ, as shown in Fig. 6. (a) Find the differential gain, the common-mode gain, and the common-mode rejection ratio(in dB) if the output is taken single-endedly and the circuit is perfectly matched.