I don't have idea how to solve it Help me!!!!

Question

Find the Fxy ,the Fyz ,the Fzx and the Fxyz when F(x,y,z)=(x^2)y+x(y^2)+y(z^2)?

Answer 1

(1)

F(x,y,z) = x²y + xy² + yz²

Answer 2

(2)

F(x,y,z) = x²y + xy² + yz²

Answer 3

(3)

F(x,y,z) = x²y + xy² + yz²

Answer 4

(4)

F(x,y,z) = x²y + xy² + yz²