Write a function named trim-to that takes a symbol and list as parameters. Return a new list starting from the first occurrence of the input symbol in the input list. If there is no occurrence of the symbol, return nil For example: (trim-to‘c '(a b c d e)) This should return the following list: '(c d e) 9. ackermann (number number) Write a function named ackermann that takes two integers. Use the following function definition: (Note: due to this function's complexity it may not finish for inputs larger than 3) A(x, y) = y +1 if x = 0 A(x – 1,1) if y = 0 (A(x – 1, A(x, y – 1)) otherwise

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