Have you bothered looking at any of the links the google search
I posted gave you?
I've volunteered to be your search-engine; i will *not* type it for you.
Do your own homework. If it takes reading for you to understand what you
are meant to be doing - all the better; that's what the assignment is
there for in the first place.
And with these words I'm closing this thread.
Cheers,
Tink
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