You're going on a trip to Europe! However, you the size of your carry-on piece is limited by the airline to a total of 45 inches. The height is to be 4 inches less than the width. a. Write a function for the value V as a function of x, the width of the carry-on b. Graph the function (provide your graph as part of your work) and determine the dimensions that will create a single carry-on with the maximum volume. Round to the nearest inch.