...But i got stuck in the part where i have to write the program implementation. Can someone pls explain to me what type of information i have to write in the program implementation method?...
Writing the program implementation refers to writing the actual code to make the program perform its intended task, thus your questioning is a bit confusing.... If you're trying to write documentation for the method, how about
writing what the method does? Sorry, but it seems kind of obvious to me... unless I misinterpreted your question which is very possible.