An amplifier having Ri = 1M Ω, Ro = 1kΩ, and Avoc = -104 is operated with a 1-kΩ load. A source having a Thévenin resistance of 2 MΩ and an open-circuit voltage of 3 cos(200 πt) mV is connected to the input terminals. Determine the output voltage as a function of time and the power gain.