Refer to Table $2.$ The average fixed cost of producing four units is

$\backslash$table$[[\backslash$table$[[$Quantity of$],[$Output$]],$Fixed Costs,Variable Costs,Total Costs$],[0,$$$10,$$$0,],[1,10,5,],[2,10,11,],[3,10,18,],[4,10,26,],[5,10,36,]]$