How to get nth element from a 10-tuple in Haskell?

As you may or may not know fst and snd only work for 2-element tuples ie

fst' (a,b) = a

You have to write you own as far as I know

get5th (_,_,_,_,a,_,_,_,_,_) = a

As you can see you may want to define your own type.