What is the probability that the return on corporate bonds will be less than 0%?

What is the probability that the return on small company stocks will be less than 0%?

What is the probability that the return on large company stocks will be greater than 5%?

Below are the historical arithmetic average returns and standard deviations for different asset classes. Asset class T-bills Corporate bonds Small company stocks Large company stocks Mean return Standard deviation 0.031 0.084 0.323 0.202 0.035 0.063 0.169 0.121 Assume that the returns are normally distributed. Use Excel's NORM.DISTO function to answer the following questions