Q9- In a class-room of students, samples are taken from 5 students Buggs, Goofy, Homer, Mickey, Donald who have their corresponding ages as follows 18. 17. 18. 19, 21. a) Calculate the sample mean age. (1 Marks) b) Calculate the sample variance. (2 Marks) c) What is the probability of having an age bigger than 17 which is also an odd number? (2 Marks) Buggs is 1.7cm tall Goofy is 1.85cm tall, Homer is 1.72cm tall Mickey is 1.67cm tall Donald is 1.8cm tall d) What is the probability of having an age bigger than 18 and being shorter than 1.75cm