1. (a) Write a C program that allows a user to perform each of the operations listed below on text files.

   1. FILE OPERATIONS: Create File - Create a new file with a specified name. Copy File - Create a new file with a specified name and identical contents to an existing file. Delete File - Delete an existing file with a specified name. Show File - Display the contents of an existing file with a specified name.

      LINE OPERATIONS: Append Line - Create a new line of content at the end of a specified file. Delete Line - Delete a line of content at a particular line number in a specified file. Insert Line - Create a new line of content at a particular line number in a specified file. Show Line - Display the contents of a file at a particular line number in a specified file.

      GENERAL OPERATIONS: Show Change Log - Display the sequence of operations performed on all files created by your program, including the number of lines following each operation. Show Number of Lines - Show the number of lines in a specified file.

      You must provide a command-line interface and operate on files in your current working directory but, apart from these requirements, you may implement the program in any way. You should document all design decisions not covered above, e.g., how a user specifies the operation they want to perform.

   2. (b) Implement two additional operations or extensions to the operations listed above. You should provide justifications for the usefulness of the functionalities you introduce.

   3. (c) Write an explanation of your C program. You should incorporate this explanation using detailed code comments and separate written explanations.