QUESTION 8 1 points Save Select the true statements about the function of the physical layer: providing bit encoding (like Manchester or others) providing the physical connection between sender and receiver detects duplicate messages transmission of bits providing guaranteed transmission of data specifying the type of connection and type of signals, waves or pulses that pass though it defining the rules by which one and zeroes are transmitted providing character-encoding (like ASCII or other) QUESTION 9 When converting analog signal to digital using pulse amplitude modulation (or sampling) and using 128 amplitude levels, how many bits per sample are needed? (Enter just a number) QUESTION 10 1 points When sending 4 bits per symbol using frequency modulation, the number of different frequencies needed would be