(a) An inverting amplifier uses an op-amp with an open-loop \(3 \mathrm{~dB}\) frequency of \(5 \mathrm{~Hz}\). The closed-loop low-frequency gain is to be \(\left|A_{v f}\right|=75\) and the closed-loop bandwidth is to be \(35 \mathrm{kHz}\). (i) What is the required value of the open-loop low-frequency gain? (ii) Determine the feedback transfer function \(\beta\).

(b) Using the results of part (a), what is the closed-loop bandwidth and closed-loop low-frequency gain if the open-loop lowfrequency gain decreases by 10 percent?