4.4. Suppose y = f[x) = Ix 3| . This has the graph seen below a. Give a simple parametrization. What is assumed about any restrictions on the parameter r in your equations? Explain. ". a b. Suppose another student wanted to parametrize y = Ix 3| using at = 5: + 3 3' = ISrI t any real number Explain why this would still be a valid parametrization of the graph. c. What would be wrong with the following parametrization x = J? y = Isl? - 1| t any real number