Option 2: -3 utils -> Marginal Utility (MU) is the change in total utility from consuming an additional unit. MU of 4th unit = Total Utility at 4 units - Total Utility at 3 units = 2 - 5 = -3 utils. This negative marginal utility indicates that consuming the 4th unit actually decreases overall satisfaction, suggesting the consumer has passed the point of maximum utility. -> correct