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Normalize the vectors in the set $\{ (1,1), (1,-1) \}$.

$\{ (1,0), (0,1)\}$

$\{ (\sqrt{2},\sqrt{2}), (\sqrt{2},-\sqrt{2}) \}$

$\{ (2,2) ,(2,-2) \}$

$\{ (\frac{1}{\sqrt{2}}, \frac{1}{\sqrt{2}}), ( \frac{1}{\sqrt{2}}, \frac{-1}{\sqrt{2}}) \}$

$\{ (\frac{1}{\sqrt{2}}, \frac{1}{\sqrt{2}}), ( \frac{1}{\sqrt{2}}, \frac{1}{\sqrt{2}}) \}$