40 POINTS IF RIGHT AND EXAM DUE IN 20 MINS

Rewrite one eighteenthx3y + seven eighteenthsxy2 using a common factor.

one thirdxy(6x2 + 7y)
one thirdx2y(6x2 + 9y)
one eighteenthxy(x2 + 7y)
one eighteenthx3y2(y + 7)