What is the maximum bit rate, in bps, of this channel?What is the level of signal-to-noise ratio required to maintain the data rate?

Question 1
Suppose you are tasked to setup a video Zoom meeting in your company conference room. Knowing that the conference room camera is Logitech Conference Video Conference Webcam, with Built-In Speakerphone. The microphone Bandwidth: 200 Hz – 8 kHz and transmit video using a matrix of  picture elements, where each element can take on one of 32 intensity values. Assume that 30 pictures are sent per second.
Find the video Data Rate R .
Assume that the Zoom conference is transmitted over a CAT5 10/100 Mbps Ethernet cable operating at 800-MHz bandwidth and a -35dB signal-to-noise ratio. Find the capacity of the channel
Question 2
Consider a noiseless channel with a bandwidth of 7 kHz transmitting a signal with four signal levels. What is the maximum bit rate, in bps, of this channel?
Question 3
You are tasked to create a network with minimum bandwidth capacity of 50 Mbps, the Network bandwidth of the channel is 45 MHz Assuming white thermal noise, what is the level of signal-to-noise ratio required to maintain the data rate?

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