Consider the following low-spin complexes
\( \mathrm{K_3[Co(NO_2)_6]} \), \( \mathrm{K_4[Fe(CN)_6]} \), \( \mathrm{K_3[Fe(CN)_6]} \), \( \mathrm{Cu_2[Fe(CN)_6]} \) and \( \mathrm{Zn_2[Fe(CN)_6]} \).
The sum of the spin-only magnetic moment values of complexes having yellow colour is ________ B.M. (answer in nearest integer)
