For a new coffee shop Barista Inc wants to assign its workers. Each full-time worker at Barista Inc has a work schedule that depends upon the Group they belong to. Group Fern mandates 3 consecutive -day, whereas Group Fir mandates 4 consecutive -day work week. Barista also has part-time workers as Group Purple who only work 2 consecutive days. It is 8-hour day for Group Fern, Group Fir, and Group Purple. Group Fern and Group Fir get paid the same $16 an hour whereas Group Purple are paid $13 an hour. Barista insurance policy requires that for every 3 part-time workers at work there be at least 1 full-time worker. Barista can hire workers from either Group Fern or Group Fir for the new location and of course Group Purple too. Barista planning to bring in workers as numbered below - they don't work on weekends. Monday (12), Tuesday (7), Wednesday (4), Thursday (3) and Friday (9). Barista wants to staff the location with full timers (either Group Fern or Group Fir) and part-timers. How should Barista staff the new location? Should it go with Group Fern or Group Fir to go with Group Purple?