Imagine that you and your friend have been asked to write a C++ program to list all the 10 U.S. federal holidays in increasing calendaristic order. (Rules on deciding these holidays are presented here: https: //www.redcort.com/us-federal-bank-holidays/_). You decide to split the task as follows: -Your friend will write the code for a Holiday class - You will write the main function that will use the Holiday class Your friend provides you the following header file containing only the class declaration: class Holiday { public: Holiday (string holidayDate): // initialize with the given holiday's // date in the calendar Int getDay (): // return the day of the holiday Int getMonth(): // return the month (1 - 12) of the holiday }: a) Is this header file sufficient for you to write your main function code? Or do you also need to see the Holiday class' source file with the class definition? b) Is this header file sufficient for you to compile your program? Or do you also