In starter code for CreatingCourses.java, please complete one TODO in main and define three methods $($see the starter code$).$ The program does the following: $(1)$ Prompt the user to enter a sequence of courses through a loop and save all the courses in an array list. $(2)$ When user doesn't have more courses to enter, sort the courses by their category and then by CRN$.$ You will need to implement the Comparable interface somewhere. $(3)$ If the user didn$$t enter any course, the program should print $$No courses entered.$$ and exit. Otherwise, proceed as follows: a$.$ Display all the courses. b$.$ Prompt user to enter a course name, search through the array list $($when comparing, ignore case difference$).$ If found, display $$Course found.$$ And then display the course. If not found, display "Course not found."