3. The perimeter of a rectangle is 20 feet. V x (a) Write the rectangle's diagonal as a function of x. (b) Express the area of the rectangle as a function of x: (c) Find the largest possible area of the rectangle.Problem 2 Below is a graph of y = h(x). On the same graph, sketch y = h-1(x). - 5 -5 0 5 -5 Problem 3 Find the range of f(x) = 2x x - 3 by finding the domain of the appropriate function. (hint: the domain of f-1 is the range of f, so, find f-1 then compute its domain)