Let the sequence Xn, n = 1, 2, 3, . .., be a Bernoulli process with parameter P (Xn = 1) = p for all n 2 1. Let U be the time when a value of 0 is first observed: U = min {n : Xn = 0} Then, the random variable U is: O Geometric with parameter p O Geometric with parameter 1 - p O None of the above