Public Goods and Common Resources $-$ End of Chapter Problem

The accompanying table shows Tanisha's and Ari's individual marginal benefit of different amounts of street cleanings per month. Suppose that the marginal cost of street cleanings is constant at $$9$ each.

$\backslash$table$[[\backslash$table$[[$Quantity of street$],[$cleanings per month$]],\backslash$table$[[$Tanisha$\text{'}$s$],[$individual$],[$marginal benefit$]],\backslash$table$[[$Ari$\text{'}$s$],[$individual$],[$marginal benefit$]]],[0,-,-],[1,$$$10,$$$8$