Boys and girls: A couple plans to have children until a girl is born, but they will have no more than four children. Assume that each child is equally likely to be a boy or a girl. Let y be the number of boys they have part 1 Find the part 1 Find the probability distribution of Y. Round your answer to four decimal places, as necessary Part 2 Compute the mean mu_y. Round the answer to two decimal places mu Y = Part 3 Compute the standard deviation Y. Round the answer to three decimal places Y=