HELP PLEASE In a park, a picnic area is surrounded by grass in the shape of a rectangle, as shown in the diagram below. If the area of the shaded region that represents the grass is 48 square yards, what are the length and width of the picnic area?

1. Write expressions that represent the area of larger rectangle and the smaller rectangle.( separate expressions for smaller and larger)
2. Write an equation that represents the area of the shaded region.
3. Find the value of x.
4. What are the dimensions of the picnic area?