Let JO, J1,..., J4 independent random variables according to the Ber (r₁) law, where i = 0, 1,..., 4, respectively. We define the random variables Xi = min {JO + Ji, 1}, for i = 1, 2, 3, (a) Find the law of Xi, for each i = 1, 2, 3, 4. (b) Find the law of (X1, X2, X3, X4).

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