Essay question, Thank you

Use diminishing marginal utility to explain why millionaires oen do not have many homes, even if they can afford it. (5 Marks) 2- Can marginal utility be negative? Briey explain with an example. (5 Marks) I 3- Using graphs, show the relationship between production and costs, by using marginal Product of labor (MPL), Average Product of labor (APL), Marginal cost (MC), and Average Cost (AC) curves? (10 marks) 4- State the three cases of Returns to scale. Exp lain when each case could be realized