The table below shows the quantity of workers and total output for a local pizza restaurant. Answer the following questions based on this table:

$\backslash$table$[[$Quantity of Workers Total Output,$],[0,0],[1,4],[2,-],[3,18],[4,23],[5,27],[6,25]]$

a$.$ When the owner hires $4$ workers, the average product of labor is pizzas. $($Enter your response rounded to two decimal places.$)$

b$.$ The marginal product of the fifth worker is pizzas. $($Enter your response as a whole number.$)$

c$.$ If the marginal product of the second worker is $6,$ then the total number of pizzas produced when $2$ workers are hired is $$ pizzas. $($Enter your response as a whole number.$)$

d$.$ Assuming the marginal product of the second worker is $6,$ the law of diminishing marginal returns set in with the

A$.$ fifth worker hired.

B$.$ sixth worker hired.

C$.$ fourth worker hired.

D$.$ third worker hired.