Alifeguard needs to rope oil' a rectangular swimming area in front of Long Lake Beach, using 1200 yd of rope and oats. What dimensions of the rectangle will maximize the area? What is the maximum area? (Note that the shoreline is one side of the rectangle.) ' Letx be the length of a side of the_rectangle perpendicular to the shoreline. Write the objective function for the area in terms of x. Atx) =D (Type an expression using x as the variable.)