Question: Haksell Define the following library functions on lists using recursion. A. Concatenate a list of lists: concat :: [[a]] -> [a] B. Produce a list

Haksell

Define the following library functions on lists using recursion.

A. Concatenate a list of lists: concat :: [[a]] -> [a]

B. Produce a list with "n" identical elements: replicate :: Int -> a -> [a]

C. Select the "n"th element of a list: (!!) :: [a] -> Int -> a

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