Answer :
The total utility of 4 units is 50 and the marginal utility is 5
Total utility is the sum of satisfaction that is derived from the consumption of units of a good or service.
Total utility can be determined by adding the marginal utility of each unit that is consumed.
Total utility of consuming 4 units = marginal utility of the first unit + marginal utility of the second unit + marginal utility of the third unit + marginal utility of the fourth unit
20 + 15 + 10 + 5 = 50
Marginal utility is the change in total utility when consumption increases by unit. Marginal utility is 5
Please find attached the table used in answering this question. To learn more about marginal utility, please check: https://brainly.com/question/14149928?referrer=searchResults
