Find the value of ∯\( \left( {\vec r.\vec N} \right){\rm{ds}}\) where \({\rm{\vec r}} = {\rm{x\hat i}} + {\rm{y\hat j}} + {\rm{z\hat k}}\) and S is the surface of sphere \({{\rm{x}}^2}{\rm{}} + {\rm{}}{{\rm{y}}^2}{\rm{}} + {{\rm{z}}^2}{\rm{}} = {\rm{}}16\) ____
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