4.4. Let y — number of languages in which a person is fluent. According to Statistics Canada, for residents of Canada this has probability distribution P(0) = 0.02, P(l) = 0.81, P{2) =

0.17, with negligible probability for higher values of y.

(a) Is y a discrete or a continuous variable? Why?

(b) Construct a table showing the probability distribution ofy.

(c) Find the probability a Canadian is noi multilingual.

(d) Find the mean of this probability distribution.