1.
\mathrm{Maximum}(0,4)
2.
\mathrm{Minimum}(1,-4)
3.
\mathrm{Maximum}(-1,3),\mathrm{Minimum}(1,-1)
4.
\mathrm{Minimum}(3,-1)
5.
\mathrm{Maximum}(-1,2),\mathrm{Minimum}(1,-2)
6.
\mathrm{Minimum}(-5,0)
7.
\mathrm{Minimum}(-2,-\frac{1}{4})
8.
\mathrm{Maximum}(-\sqrt{3},-4\sqrt{3}),\mathrm{Minimum}(\sqrt{3},4\sqrt{3})
9.
\mathrm{Maximum}(0,\frac{1}{9})
10.
\mathrm{Saddle}(0,-3)
