(LO2) Sasha owns eight profitable rental properties and would like to shift some of this income to her children, Darius, age 17, and Delilah, age 11. Darius would be responsible for yard maintenance, snow removal, and other various jobs. Delilah would help her mom clean and maintain the apartment units. What factors should Sasha consider in setting an appropriate income for Darius and Delilah?