Problem 3. (problem 8.31 page 158) In a large population of individuals, wage income has a mean of $20,000 per year and a standard deviation of $5000 per year. Asset income has a mean of $3000 per year and a standard deviation of $2500 per year. The correlation coefficient between wage income and asset income is .4. Total income is a sum of wage and asset income. Find the mean and standard deviation of total income for this population