The number of tails showing when flipping four coins is a discrete random variable. Denote it by X. The possible values of X are 0, 1, 2, 3, 4. Calculate the following probabilities. Enter their exact values. P(X = 0) =  P(X = 1) =  P(X = 2) =  P(X = 3) =  P(X = 4) =  P(X ≥ 2) =

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