(a) The closed-loop gain of a feedback amplifier using an ideal feedback amplifier ((A ightarrow infty))...

(a) The closed-loop gain of a feedback amplifier using an ideal feedback amplifier \((A \rightarrow \infty)\) is \(A_{f}=125\). What is the value of \(\beta\) ?

(b) If the basic amplifier has a finite open-loop gain, what must be the value of \(A\) such that the closed-loop gain is within 0.25 percent of the ideal value. Use the results of part (a).