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Comunication technology

I was wondering if you can please help me with the solution to the following questions.

1a. When a square wave with a fundamental frequency of 2khz and amplitude 5v and comprised of up to five odd harmonic (each successive odd harmonic having half the amplitude of its predecessor) is passed though a standard telephone line of bandwidth of 4kHz it was found to be severely degraded. Explain why this happens and draw what may appear on a spectrum analyser and oscilloscope at the input and output of this system assuming there is no attenuation.

1B. A single pole low pass RC filter has component values 100 ohms and 0.1 uf. If a signal Vi = 5 Sin 6283 (t) is applied, calculate:
1) The peak output voltage
2) The phase angle
3) The propagation delay time.

Solution Summary

This solution is provided in 110 words in an attached .doc file, including two graphs. It describes how to find a fundamental sine wave and harmonics, as well as references lowpass filters.