Question: Write a Scheme function: listleaves, defined so that (listleaves bt) lists the leaves in the binary tree bt, using the representation discussed in class and

Write a Scheme function: listleaves, defined so that (listleaves bt) lists the leaves in the binary tree bt, using the representation discussed in class and the text. For example, (listleaves '(a (b (c () ()) (d () (f () ()))) (e () ())))

returns, (c f e)

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