Answer:
Diminishing returns set in when the firm hires four laborer
Step-by-step explanation:
given data
one laborer produces = 6 unit
two laborer produces = 14 unit
three laborer produces = 22 unit
four laborer produces = 24 unit
five laborer produces = 25 unit
solution
we know that in the Diminishing returns it is refer to that fact when once it hit an certain point than each of the additional units give it less and the less returns for money
so here when one laborer 6 unit produce so when two it is more 8 more and when three than 8 but when four labor than it is 2 more production only
so here Diminishing returns set in when the firm hires four laborer