ISSUES IN SOLUTION

Students should already be familiar with Mathematica's Plot[] command before attempting this problem.

Because the Play[] command takes a lot of time, students should be warned to play tones for short time intervals -- say {t, 0, 1}.

It is difficult to hear the difference between the scales in problems number 7 and 8. Thus, it's important to rely on mathematical analysis using the Play[] command only as a check for reasonableness.
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