I'm working on the exact same problem that was answered here:

https://www.coursehero.com/tutors-problems/Economics/27062222-Your-company-utilizes-both-employees-L-and-specialized-robots-R-in/?justUnlocked=1

So, this question is answered, and sure I can use the answer and just go on my merry way but that won't help me understand at all. Part A and B are simple enough. But for parts C and D, how did the tutor come up with the optimal number of employees and robots?

Can someone explain HOW to come up with 6 robots in the off-season (especially when no parameters for off-season volumes are given)?

How do we decide that only 1 employee is optimal, when we have no understanding of what needs the employees are filling for the firm?