A typical telephone channel has the bandwidth of 3100 Hz can support dial-up modems that can variable speeds depending on the quality of the links on both ends of the data call. a) (4 points) Assuming the dial-up modem is working at rate of 33.6 kb/s, compute the minimum needed Eb/NO in dBs. b) (4 points) For part (a), what is the theoretical minimum number of bits per symbol needed to achieve this 33.6 kb/s? c) (4 points) What are (1) the baud rate and (2) number of bits per symbol used on a standard telephone channel that operates at 33.6 kb/s. Specify the standard model that implements the above specifications for a dial-up modem. d) (3 points) What is the theoretical (Shannon) limit for capacity on home-to-home connection (i.e. path that includes two subscriber loops) using dial-up modems? Why? Hint: Refer to textbook pages 145-147.