Please help with these easy calculation problems :)

Quantity Pat's marginal Al's marginal Marginal cost benefit (dollars) benefit (dollars) (dollars) 10 4 0.50 2 7 3 1 3 4 2 1.50 4 2 2 5 1 O 2.50 6 0 0 3 If the good in the table above is a public good with no negative externality present in the market and Pat and Al are the only members of society, then the allocationficient quantity to produce is O 4 units O O units O 2 units O 5 units O 3 unitsPrce and costs (dollars per ton) 50 MSC 40 Q 30 MC = S 20 Q.......... . . ... 10 D = MSB O O 2 4 6 8 10 12 Chemicals (tons per week) A chemical factory and a fishing club share a lake. Producing chemicals creates water pollution that harms the fish. The marginal social cost, private marginal cost, and marginal benefit from producing chemicals are in the figure above. Initially the lake is owned by no one. Keeping in mind the Coase theorem, if transactions costs are low then if the chemical factory owns the lake tons of chemicals will be produced and if the fishing club owns the lake, tons of chemicals will be produced. O 4;8 O 8; 8 O 4:4 0 8;4Total Utility of Number of MEMUWHY soda burgers of burgers Number of sodas David's total utilities for sodas and his mgm utilities for mini burgers are given in the above table. The price of a soda is $1 and the price of a burger is $2. If David's income is $9, how many sodas and burgers will he buy to maximize his utility today? Assume that David can only buy whole units of sodas and burgers. David spends all his income. 0 9 sodas and 0 burgers O 7 sodas and 1 burger O 1 sodas and 4 burgers O 5 sodas and 2 burgers O 3 sodas and 3 burgers