Question $52$

Table $10-1$

$\backslash$table$[[\backslash$table$[[$Quantity$],[($Units$)]],\backslash$table$[[$Private Value$],[($Dollars$)]],\backslash$table$[[$Private Cost$],[($Dollars$)]],\backslash$table$[[$External Cost$],[($Dollars$)]]],[1,14,10,2],[2,13,11,2],[3,12,12,2],[4,11,13,2],[5,10,14,2],[6,9,15,2],[7,8,16,2]]$

Refer to Table $10-1.$ What is the socially optimal quantity of output in this market?

$3$ units

$2$ units

$4$ units

$5$ units