Group table for the character group for $\textrm{Gal}(K/\mathbb{Q})$

$K$ is the global number field defined by \( x^{2} - 2 \)

$\times$ \(\chi_{ 8 } ( 1, ·)\) \(\chi_{ 8 } ( 5, ·)\)
\(\chi_{ 8 }(1, ·)\) \(\chi_{ 8 } ( 1, ·)\) \(\chi_{ 8 } ( 5, ·)\)
\(\chi_{ 8 }(5, ·)\) \(\chi_{ 8 } ( 5, ·)\) \(\chi_{ 8 } ( 1, ·)\)