(a)

The learning curve that describes this minimum requirement :

The learning curve of a new employee producing atleast  units per day after  days on the job.

To find the minimum requirement substitute the values in the equation .

Where .

Therefore, the learning curve is .

(b)

The number of days before a minimum achiever is producing units per day :

Substitute and solve for the value of .

(a)

The learning curve that describes this minimum requirement is .

(b)

The number of days before a minimum achiever is producing units per day is .