1) Create a class called Course. It will not have a main method; it is a business class. 2) Put in your documentation comments at the top. Be sure to include your name. 3) Course must have the following instance variables named as shown in the table: Variable name crn subject number sectionld creditHours instructor isAvailable Description A unique number given each semester to a section (stands for Course Registration Number) - int A 4-letter abbreviation for the course (e.g., ITEC, PHED, CHEM) A 4-digit number associated with the course (e.g., 1001, 0099) - int A 2-digit number associated with a particular section of a course (e.g., 01, 13, 47) -int Number of credit hours the course is worth. Valid values are 0, 1, 2, 3, or 4. The default value is 3. -int First and last name of the instructor teaching the course. If the instructor is not known, this should be listed as "TBA" - String Value is either true or false based upon whether the course is available for registration. Default is false. - boolean 4) Create a constructor that has the crn, subject, number, and sectionld as String. Initialize the other instance variables based upon the default values in the table above. Call the appropriate setters from #7 to validate data. 5) Add a 7-argument constructor that uses all parameter variables as Strings to set the instance variables. Make sure your constructor calls the setters from #7, to ensure all data is validated. (All arguments will be of type String.) 6) Generate all the getters and setters 7) Changes to make to generated getters and setters to make sure data is valid: • public void setCrn(String input) - if input consists of all digits, convert input to integer. Use this integer to set the CRN. Otherwise, set the CRN to 9001 and display an error message that "Invalid value typed for CRN. Defaulting to 9001." public void setNumber(String input) - if input consists of all digits and is in the range of 1 - 9999, convert input to integer. Use this integer to set the course number. Otherwise, set the course number to 1001 and display an error message that "Invalid value typed for course number. Defaulting to 1001." • public void setSectionId(String input) -if input consists of all digits and is in the range of 1-80, convert input to integer. Use this integer to set the section Id. Otherwise, set the section ID to 1 and display an error message that "Invalid value typed for section ID. Defaulting to 1." • public void setCreditHours(String input) -if input consists of all digits and is in the range of 0 - 4, convert input to integer. Use this integer to set the number of credit hours. Otherwise, set the credit hours to 3 and display an error message that "Invalid value typed for credit hours. Defaulting to 3." • public void setlsAvailable(String input) - if input starts with 't', 'T', 'y', or "Y", set Available to true. Otherwise, set is Available to false. 8) Create the toString method