Question 2 - Normal Distribution (8 marks) Suppose that the return for a particular investment is normally distributed with a population mean of 10.1% and a population standard deviation of 5.4%. a) What is the probability that the investment has a return of at least 20%? (2 marks) b) What is the probability that the investment has a return of 10% or less? (2 marks). A person must score in the upper 5% of the population on an IQ test to qualify for a particular occupation. c) If IQ scores are normally distributed with a mean of 100 and a standard deviation of 15, what score must a person have to qualify for this occupation? (4 marks).