Verify that the following function is a probability mass function, and determine the requested probabilities. f(x) = (216/43) (1/6)*, x = {1,2,3) Round your answers to four decimal places (e.g. 0.9876). Is the function a probability mass function? (a) P(X ≤ 1) = i (b) P(X> 1) =i (c) P (2 < X < 10) =

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