( points ) 7. Your friend has two jobs. She works a different number of hours each week, so her paycheck for each job is different from week to week. Her average weekly paycheck is $110 for job one and $75 for job two. What is her average weekly income if these are her only jobs? (3.5 points) 8. Your friend's parents each have a job. Her mother's average weekly salary is $740 with a standard deviation of $43. Her father's average weekly salary is $535, with a standard deviation of $25. Find the average weekly salary of her parents combined, and the standard deviation of their combined salaries. You can assume that the amount of money her mother makes has no effect on her father's salary, and vice versa. (3.5 points)