You see that in 2016, AAPL stock had a return of 12.48%. In 2017, AAPL had a return of 48.48%. In 2018, AAPL had a return of -5.34%. In 2019, AAPL had a return of 88.97%. Using only this historical data: (a) What is the expected return for 2020? (b) What is the standard deviation of expected returns for 2020? (c) With what probability do you expect AAPL stock will have a negative return in 2020? Note: this question cannot be answered without making an assumption about the distribution of returns. State your distributional assumption!