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Given the following Scheme definition: (define x (define (fib n) (if (
Given the following Scheme definition:
(define x (define (fib n)
(if (<= n 1) n
(+ (fib (- n 1)) (fib (- n 2))))))
(This defines not the Fibonacci function fib, but the variable x.) Write Scheme expressions in terms of x that would have the effect of extracting the following expres- sions: (a) (fib n) (b) <= (c) (fib (- n 1)) (d) The third occurrence of fib. (e) The last occurrence of n. E.g.,theexpression(car x)wouldextractdefine.
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