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Suppose a discrete random variable can o...

Suppose a discrete random variable can only take the values 0, 1, and 2. The probability mass function is defined by
`f(x)={{:((x^(2)+1)/k",", "for x=0,1,2"), (0, "otherwise"):}`
Find (i) the value of k (ii) cumculative distribution function (iii) `P(X ge 1)`.

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