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{4) The function f(x) = 7].; is not bounded at x = 0. (a) Is it, however, Riemann-integrable on the interval [0, 2]? Justify your answer. (b) Is it Riemann-integrable on [1, on)? Justify your answer. (c) Is it Riemann-integrable on the interval [2021,2022]? Justify your