4. What code fragment should replace Z for function A to return the quotient of a and b (the integer part of %)? You may assume that the initial arguments to the function A are positive integers. 1 2 3 4 function Ala, b) if a = b return 0 else return Z + 1 end if end function 5 6 7 A(a - 1, 6-1) Ala - 1, b + 1) A(a + 1, 6-1) Ala - 1, b) A(a, b - 1) a Ala, b-a) A(a + 1, b + 1) none of the other answers