52. Sketch the graph of a function whose domain is the interval [o, 4] and whose range is the set of two numbers {2, 3}.54. Give an example of a set consisting of two points in the coordinate plane that is not the graph of any function.68. Give an example of a function F whose domain is the interval [o, 2] and such that Fro) = o and F(2) = 2 but 1 is not in the range of F.72. Give an example of a function whose domain is the interval [o, 1] and whose range is the interval (0, 1)