What is the average number of books read by 30 students in a month if the data set consists of {10, 8, 12, 15, 7, 9, 11, 13, 14, 6, 10, 10, 12, 9, 12, 8, 7, 10, 11, 13, 10, 8, 9, 11, 12, 8, 7, 9, 13, 10}?
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Math question: Find the seventh derivative of f(x) = 3x^5 + 2x^3 - 7x^2 - 5x + 4.
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Find the period, asymptotes, and the range of the function f(x) = cot(x).