8. You are going to renovate your store. If you use fewer workers, then it costs less money to do the work, but you lose more revenue while the store is closed. Suppose that when you use a workers, it costs 2000 + 80x to do the work and you lose 2000 in revenue. Then the total cost of the 1 project is C'(x) = 2000 + 80x+2000x.How many workers should you use if you want to minimize the cost of the project?