hi could anyone help me with this question?
Write a function that will take a list of pairs and return just the pair 
comprising the first element of the first pair and the second element of 
the last pair.
 > (reduce-pairs ’()) 
 > (reduce-pairs ’((1 2) (3 4))) 
(1 4)
 > (reduce-pairs ’((1 2) (3 4) (5 6))) 
(1 6) 

I have got this so far
(define reduce-pair(λ(x y)(cond
                          ((pair? x)x)
                          (cons( car x)
                               (cons ( list-tail (second y)))))))
but its completely wrong
thanks in advance

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