My question is regarding B, I don't know how to find the scoops of ice cream he should consume to maximize utility. I have used this formula MUx / Px = MUy / Py but i couldn't get it. I also have a question regarding part d on finding the reservation price for the 4th scoop of ice cream. Below my answer for part A

Ice Cream Other Goods Total Marginal Bundles Total Marginal Scoops Utility Utility Utility Utility ONOUSWNKO 0 30 6 48 12 61 18 71 24 79 30 86 36 92 DOYOUSWNKO 42 97 48 Benson enjoys eating ice cream. He can also purchase a bundle of other goods for $3. A. Complete the table. B. Based on the table, explain how many ice cream scoops Benson should consume to maximise his utility if the price of a scoop of ice cream is $6. C. On a graph, plot Benson's demand curve for ice cream. D. Explain how to obtain Benson's reservation price for the 4th scoop of ice cream.Ice Cream ($6) Other Goods ($3) Scoops Total Utility Marginal Bundles Total Utility Utility Marginal Utility 0 0 0 0 0 0 30 30 1 6 6 IN 48 18 2 12 6 61 13 18 6 71 10 4 24 6 5 79 8 5 30 6 6 86 7 6 36 6 92 6 42 6 CO 97 8 48 6