2 2 points For each of the following functions Find the function s domain i e the set of all input values Find the function s image i e the set of all output values Sketch several of its level curves on one set of axes a contour plot How many level curves At least 4 for each function generally sketch however many i sufficient to get a sense of the shape of the graph of f a f x y e y x b f x y ln x y 4