(1 point) Let L be the line in R^3 that consists of all scalar multiples of the vector \left[\begin{array}{l} 1 \\ 2 \\ 2 \end{array}\right] Find the orthogonal projection of

the vector \vec{x}=\left[\begin{array}{l} 7 \\ 3 \\ 5 \end{array}\right] \text { onto } L \text { . } \operatorname{proj}_L\vec{x}=\mleft\lbrack_{---}\mright\rbrack