(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 substiute 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 :

Substiute  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 .