Need helping solving this problem. Plz!

Consider the four functions Y1 = X, Y2 - X2, Y3 - X3, YA - X4. If X =0 then Y1 = ? then Y2 = ? then Y3 = ? then Y4 = ? Answers are integers. If X = 1 then Y1 = ? then Yo = ? then Y3 = ? then YA =? Answers are integers. If X = 2 then Y1 = ? then Yz = ? then Y3 = ? then YA = ? Answers are integers. If X = 3 then Y1 = ? then Y2 then Y3 = ? then YA = ? Answers are integers