Can you show me how to figure this out using marginal utility analysis?

Molly attends college and works parttimejob as a telemarketer. She can work up to 40 hours each week at herjob, which pays $8 per hour. The table below shows her utilityr from different levels of leisure and income. Molly is currently working 20 hours per week. If she decides to work 30 hours instead. then her marginal utility loss from having less leisure is: Hours of Total Utility Total Utility Income Leisure from Leisure from Income 0 0 0 {J 5 1B 40 30 10 34 80 54 15 4B 120 72 20 56 160 81 25 60 200 87 30 62 240 90 280 92 a. 18 \\/ b. 34 c. 3