Question 1 (4 marks) Marks a) The table below shows petrol brand companies that are most preferred based on a random sample of 60 motorists surveyed who live in Sydney. Petrol brand Count BP 13 Caltex 9 Metro 28 Shell 10 What is the probability of finding a motorist who prefers either the BP, Metro, or Shell brand companies of petrol? [1] b) The Australian Bureau of Statistics publishes data on the benefits offered by small companies to their employees. Only 61% offer retirement plans while 42% offer life insurance. Suppose 33% offer both retirement plans and life insurance as benefits. If a small company is randomly selected, determine the following probabilities: i) The company does not offer a retirement plan. [1]