(a) Citing practical examples, explain the differences between the following types of unemployment listed below and how each affects economic growth. (i) Seasonal and casual unemployment. (7 marks) (ii) Disguised and unproductive unemployment. (7 marks) (b) Outline policies which if implemented would alleviate the problem of unemployment. (6 marks) (Total: 20 marks)Show using oonvolutions that if X and Y are independent random variables and X has a 2'3, distribution and Y has a 13 distribution, then X +Y has a rim distribution. [T] Let X and Y have joint density function: fx y (x, y ) = 3x- + xy 0