22. The mean age of 120 teachers in a school is 38 years with a standard deviation of 5.3. Ms. Data is 24 years old and Mr. Management is 53 years of age. Calculate the z-score of Ms. Data and the percentage of teachers that Mr. Management is older than if the teachers' age follows a normal distribution. (4 marks)\f21. Maple tree diameters in a forest area are normally distributed with a mean of 10 inches and a standard deviation of 2.5 inches. In a forest of 2000 maple trees, how man would have a diameter greater than 15 inches. Hint: think of the properties of a normal graph. (3 marks) 19. A set of 8 numbers has a median of 19. If the numbers are arranged from largest to smallest, what is the sum of the fourth and fifth number? (2 marks)