Let X = {0,1,2} and Y = {0, 1, 2}. Now we define f={(0,0).(0,2),(2,1)} Please enter your answer as a sum of the following numbers (they are not mutually exclusive): 1 ifff is a function f : X- Y 2 ifff is a function and it is also injective 4ifffis a function and it is also surjective This means that your answer can be O(not a function), 1 (a function but neither injective or surjective) 3 (a function that is only injective but not surjective), 5 (a function that is only surjective but not injective) or 7 (a function that is bijective)