Consider a power-output stage with voltage gain A1=1, an input signal Vs=1V, and a hum Vn of 1V. Assume that this power stage is preceded by a small-signal stage with gain A2 =100V/V and that overall feedback with β=1 is applied. If Vs and Vn remain unchanged, find the signal and noise voltages at the output and hence the improvement in S/N.