;; Final problem: Defining a TCO fibonacci function ;; It takes three arguments, an index and two initializers a, b. ;; The function returns the nth Fibonacci numbers starting at a and b ;; (The general call would be (fib n 0 1)). ;; ;; (fib 0 2 3) => 2 ;; (fib 3 5 8) => 21 ;; (fib 12 0 1) =>

(define (fib n a b) )