I don't know how to set this up. I am lost on what equation/formula to use. I feel like I need more info to solve it. I am actually confused to how there are two questions being asked by the problem

Going over problems that I have had issues with. Trying to get some guidance

A carpenter is building a rectangular shed with a fixed perimeter of 28 ft. What are the dimensions of the largest shed that can be built? What is its area? The dimensions of the largest shed are (1) by (2) The area of the largest shed is (3) (1) 0 ft (2) 0 H3 (3) 0 - 0 its 0 ft. 0 n3. 0 ft2 0 ha. 0 ha