A power amplifier employs an output stage whose gain varies from 2 to 12 for various reasons. What is the gain of an ideal (non varying) amplifier connected to drive It so that an overall gain with feedback of 100 ± 5% V/V can be achieved? What is the value of beta to be used? What are the requirements if Af must be held wlthm ±0.5 %? For each of these situations, what preamplifier gain and feedback factor beta are required if Af is to be 10 V/V (with the two possible tolerances)?