A copier company want to expand production. It currently has 20 workers who share eight copiers. 2 months ago the firm added 2 copiers, and output increased by 100,000 pages per day. One month ago, they added 5 workers and productivity also increased by 50,000 pager per day. Copiers cost about twice as much as workers. would you recommend they hire another empolyee or buy another copier? why?