A California asparagus farmer is maximizing profit. The price of asparagus is $2 a box, a farm worker's wage rate is $12 an hour, and the asparagus farm employs six workers.
a. What is the marginal product of the sixth worker?
b. If, when the price of asparagus increases to $3 a box,the farm hires eight workers, what is the marginal product of the eight worker?