Find the first and second partial derivatives of the function f(x, y) = (1 + 9xy)e 6x'-3y of 9ye^(-6x^(2)-3y^(2))-12x(1+9xy)e^(-6x^(2)-3y^(2)) of dy 9xe^(-6x^(2)-3y^(2))-6y(1+9xy)e^(-6x^(2)-3y^(2)) 02 f 144x^(2)(1+9xy)e^(-6x^(2)-3y^(2))-9xye^(-6x^(2)-3y^(2))(12)-12(1+9xy)e^(-6x^(2)-3y^(2))-(12)(9 02 f drdy e^(-6x^(2)-3y^(2))(108xy^(3) 02 f