Let be the number of men and be the number of women in Canada in year . Let be the average income, in Canadian dollars, of women in Canada in year .

In this problem, you do not have explicit equations for the functions , , or , so you are not able to write explicit equations to represent these functions. Your answers should be expressions obtained by adding, subtracting, multiplying, dividing, and/or composing the functions , , and .

(a) Find an expression for the function which gives the total number of people in Canada in the year .

(b) Find an expression for the total amount of money earned by Canadian women in the year .

You can earn partial credit on this problem.