What am I? Your teacher?
So you apparently don't know the answer to the above question. OK. No need to get snippy.
I can only surmise that you have a learning disability.
It’s the only explanation I can think of as to why you won’t, or can’t, read the link provided.
Oh, well. I guess the old saying ‘ignorance is bliss’ is true.
Have a nice day now. Won’t you?