In the following written questions you must show your work and justify your answers. 1. Part 1: (12 marks) The following data represents the amount of time (in hours) that 80 College students devoted to leisure activities during a typical school week. Hours Frequency 10-14 15-19 20-24 25-29 30-34 35-39 8 28 27 12 4 1 (a) (4 marks) What are the class limits, class boundaries and class marks? (b) (3 marks) Find the relative frequencies of each class, in percentage. (c) (5 marks) Determine the average time (in hours) devoted to leasure activities during a typical school week, the quantity X.