When she is not working, shelby trains to run marathons. she wishes she had more time to travel to various races but work keeps her busy. kevin does not want time off work. he needs to earn as much overtime as possible to pay off his college loans. the company recently offered either a week's pay or a week off as the bonus to the salesperson who made the most sales. both shelby and marcus worked hard to win. which advantage of individual incentives does this illustrate?

Stocks a, b, and c are similar in some respects: each has an expected return of 10% and a standard deviation of 25%. stocks a and b have returns that are independent of one another; i. e., their correlation coefficient, r, equals zero. stocks a and c have returns that are negatively correlated with one another; i. e., r is less than 0. portfolio ab is a portfolio with half of its money invested in stock a and half in stock b. portfolio ac is a portfolio with half of its money invested in stock a and half invested in stock c. which of the following statements is correct? a. portfolio ab has a standard deviation that is greater than 25%.b. portfolio ac has an expected return that is less than 10%.c. portfolio ac has a standard deviation that is less than 25%.d. portfolio ab has a standard deviation that is equal to 25%.e. portfolio ac has an expected return that is greater than 25%.