Please do in java as simply as possible with code available for copy and comments

Write a program that reads a file (provided as attachment to this assignment) and writes the file to a different file with line numbers inserted at the beginning of each line. Throw an exception if the file does not exist. An error message should result.

For example if file input is: This is a test File output should be

1. This is a test

the name of the file being read in is "Lab 4A Input file.txt" so please just use that in the code. I am more than likely going to have follow up questions as to how to get the program to read it in.