D *1.55 Design an amplifier that provides 0.5 W of signal power to a 100-Ω load resistance. The signal source provides a 30-mV rms signal and has a resistance of 0.5 MΩ. Three types of voltage-amplifier stages are available:
(a) A high-input-resistance type with Ri = 1 MΩ, Avo = 10, and Ro = 10 kΩ
(b) A high-gain type with Ri = 10 kΩ, Avo = 100, and Ro = 1 kΩ
(c) A low-output-resistance type with Ri = 10 kΩ, Avo = 1, and Ro = 20 Ω
Design a suitable amplifier using a combination of these stages. Your design should utilize the minimum number of stages and should ensure that the signal level is not reduced below 10 mV at any point in the amplifier chain. Find the load voltage and power output realized.