defining "unzip" using foldr

[John Mann]

    Hello, I'm working my way through Simon Thompson's
Haskell book and am having trouble with an exercise
where the goal is to define "unzip" using foldr.
Lambda notation and ~ , as used in the Prelude
definition of unzip, have not been introduced yet. Any
help on this would be appreciated.
John Mann

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"I'd rather be debugging...." - Anon

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