4.4. Let y number of languages in which a per- son is fluent. According to Statistics Canada, for residents of Canada this has probability dis- tribution P(0)=0.02, P(1) = 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 of y.

(c) Find the probability a Canadian is not multi- lingual.

(d) Find the mean of this probability distribu- tion.