Terry attends college and works part-time in a drug store. She can work up to 40 hours each week and is paid $9 per hour. The following table shows her utility from different levels of leisure and income.

Hours of Leisure Total Utility from Leisure Marginal Utility of leisure

5 18

10 34

15 48

20 56

25 60

30 65

35 69

40 72

Fill in the marginal utility columns above