Need to understand how to get to the answer for the variance question please

Use the table from Question 1. If the returns of assets 1 and 4 are independent, how much is the variance of a portfolio Pobtained by combining 50% of your wealth in asset 1 and 50% in asset 4? 10% 11% 12% 13% The table below summarizes the returns of various assets (in %). Return Asset 4 Table 4.3 Returns on Various Investments Market Return Condition Asset 1 Asset 2 Asset 3 Asset 5 Rainfall Good 15 16 1 16 Plentiful Average 10 10 Average Poor 4 Poor Mean return 9 10 10 Variance 24 24 54 24 Standard deviation 4.9 4.9 7.35 4.90 "The alternative returns on each asset are assumed equally likely, and thus each has a probability of 9 3 10 19 16 10 4 4 10 10 24 4.9 Consider a portfolio Pobtained by investing 60% of your wealth in asset 2 and 40% in asset 3. What is the expected return of portfolio P? 11% 12% 15% 10% Use the table from Question 1. If the returns of assets 1 and 4 are independent, how much is the variance of a portfolio Pobtained by combining 50% of your wealth in asset 1 and 50% in asset 4? 10% 11% 12% 13% The table below summarizes the returns of various assets (in %). Return Asset 4 Table 4.3 Returns on Various Investments Market Return Condition Asset 1 Asset 2 Asset 3 Asset 5 Rainfall Good 15 16 1 16 Plentiful Average 10 10 Average Poor 4 Poor Mean return 9 10 10 Variance 24 24 54 24 Standard deviation 4.9 4.9 7.35 4.90 "The alternative returns on each asset are assumed equally likely, and thus each has a probability of 9 3 10 19 16 10 4 4 10 10 24 4.9 Consider a portfolio Pobtained by investing 60% of your wealth in asset 2 and 40% in asset 3. What is the expected return of portfolio P? 11% 12% 15% 10%