Hi, how to do question 4 using the Ti-84 calculator? thanks.

1. The following probability distributions are given for return of Stock X and Stock Y. Use this data to answer questions 1 thre Market Condition Probability Stock X Stock Y pooo Average 20% %00 -5% Poor % 0z 0.2 10% Calculate the expected return of Stock X and Stock Y respectively a. 10% & 10% b. 16 % & 18% c. 18 % & 6 % ( d . ) 24% & 18% e. none of the given ones 2. The standard deviation of returns of Stock X and Stock Y is:(approximately) a. 19.1% & 12.3 % b. 14.7% & e. none of the given ones 9.3% c. 13.1 % & 18.3% d. 9.3% & 14.7% 3. Calculate the expected return on a portfolio where 50% of the funds are invested in stock X and 50% in stock a. 21 % b. 18% d. 24% e. none of the given values c. 16% 4. Calculate the standard deviation on a portfolio where 50% of the 50% in stock Y. (approximately) funds are invested in stock X and 19.1 % b. 14.4% C. 9.3% d. 18.3% e. none of the given values