hey could you please help me with this

Question 9 (1 point) Clara consumes two goods, X and Y. Her utility function is given by u(X, Y) = (X + a)(Y + [9). Suppose that a=12 and b=6. The price of X is $8 and the price of Y is $6. She has income of $160 to spend. What is her optimal amount of Y? (Answer up to 2 decimal places.) Your