A sample input file courses.csv is given. A back up file $($coursesBackup$.$csv$)$ for this sample is also given. The content of the file:

$```$

$1001,$ Eng$1$ish, Composition I, lower, RN$,$

$2001,$History,American History I,true,in$-$person,

$3003,$ Math, Calculus, true, online,

$3002,$ Math, Pre Calculus, true, hybrid,

$```$

Error Handling

$(1)$ If the user entered file name encounters a FileNotFoundException, your program should loop until user enters a file that exists. Note that the exception should be passed to the main method, where it can be try$-$catched.

$(2)$ For user input, the category comparison should be case sensitive$.$ For example, "English" and "english" are considered different and the lower case one is not a correct category.

a$.$ If a wrong category is entered by user when adding a new course, the program should not generate exception. It simply tells user that the course category is wrong and no course should be added.

b$.$ During the file read and write process, if the category encountered is incorrect, the program should generate a custom exception

UnknownCourseCategoryException exception and the program should terminate $($not try and catch it$).$ A file coursesWrong.csv that contains wrong course categories is given.

The following is a suggested order of TODOs to tackle to get started.

$1.$ Implement the method readFilePopulateList in CourseManager.java.

$2.$ Then implement the $\backslash (2^\{\backslash$text $\{$nd $\}\}\backslash )$ step of the method printCourses in CourseManager.java.

$3.$ Then implement the method updateAndCloseFile in CourseManager.java.

$4.$ Run the program, enter courses.csv for the file name. Choose $1$ and see if your program will display the courses in courses.csv correctly. Then choose $4$ to quit the program.

Open courses.csv and see whether it is still the same as before. Note that coursesBackup.csv has the same content as the original courses.csv$.$

$5.$ Then keep on going until you complete all the TODOs.