1. rewrite the previous list literals using only (:) and the empty list constructor [].

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(('a':[]):('b':[]):('c':[]):[]):(('d':[]):('e':[]):[]):[]

2. Write an expression that checks whether a list is empty, [], or its first element is empty, like [[],[‘a’,’b’]].

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firstEmpty [] = True
firstEmpty (x:_) = if x == []
                   then True
                   else False