Please help in this I cannot understand this

The Donaldson Furniture Company Stage Children's Standard Executive produces three types of rocking chairs: Cutting 5 hr 4 hr 7 hr the children's model, the standard model, Construction 3 hr 2 hr 5 hr and the executive model. Each chair is Finishing 2 hr 2 hr 4 hr made in three stages: cutting, construction, and finishing. The time needed for each stage of each chair is given in the chart. During a specific week the company has available a maximum of 175 hours for cutting, 107 hours for construction, and 86 hours for finishing. Determine how many of each type of chair the company should make to be operating at full capacity. The number of executive chairs the company should make is The number of standard chairs the company should make is The number of children's chairs the company should make is