iii. Stating the method used, calculate the intervals that contain at least 75% of the data. (8 marks) iv. Determine the actual percentage of the given data values that falls in the interval calculated in part (iii). (4 marks)Although the standard workweek is 40 hours a week, many people work a lot more than 40 hours a week. The following data give the number of hours worked last week by a random sample of 30 people. 42.8 43.7 58.7 53.8 42.4 50.1 47.5 45.3 50.6 45.0 45.6 54.1 55.0 43.7 52.7 56.3 48.5 50.1 52.7 47.2 58.8 51.4 49.1 43.9 45.8 45.9 50.6 42.7 49.9 43.7