Your USB drive has a capacity of 10^9 bytes (1 gigabyte). You wish to store a digital representation of an information source on the drive. Using a straightforward PCM representation, determine the maximum recording duration for each of the following sources: 4 kilohertz speech signal, with eight bits per sample. 22 kilohertz stereo audio signal, with 16 bits per sample in each stereo channel. 5 megahertz video signal, with 12 bits per sample, and combined with the audio signal in (b). Digital surveillance video signal, with 1024 Times 768 pixels per frame, eight bits per pixel, and one frame per second.

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