The average rate of return on investment (RoI) from the largest 500 companies trading on the Canadian Venture Exchange (CDNX) over the past eight years is 4.8%.

 For the following questions, either answer the question, or state what information is missing and which conditions are not met and any other reasons for not being able to answer the Question:

a. What is the probability that the average RoI for 100 randomly selected companies on the VSE last year is greater than 5.4%?

b. What is the probability that the average RoI for 100 randomly selected companies from the largest 500 on the VSE over the past eight years is greater than 5.4%?