Question 25
Let $m$ be the minimum value of the function
$$f(x,y)=\sqrt{x^2+y^2}+\sqrt{x^2-8x+y^2+16}+\sqrt{x^2+y^2-4x-4y+8}.$$
Determine $\lceil m\rceil$.
$$f(x,y)=\sqrt{x^2+y^2}+\sqrt{x^2-8x+y^2+16}+\sqrt{x^2+y^2-4x-4y+8}.$$
Determine $\lceil m\rceil$.