This question deals with computer networking. 1A) Calculate the bandwidth of a signal with a frequency range of 902 to 9

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This question deals with computer networking.
1A) Calculate the bandwidth of a signal with a frequency range
of 902 to 948 MHz
1B) A cable TV provider is now going to set up and distribute
within a 25km region. Please advise them on what guided media to
use to distribute their content, giving reasons for your
suggestions.
1C) Discuss one advantage and a disadvantage between using the
wireless propagation techniques of: i) sky wave and ii)
Line-of-sight