The intercepts cut off by the plane $\overrightarrow r.(2\hat i+\hat j-\hat k)=5$ with the axes are ?

Question

$(a)\:\:(2,1,-1)\:\qquad (b)\:\:(\large\frac{2}{5},\frac{1}{5},-\frac{1}{5})\:\:\qquad (c)\:\:(\frac{5}{2},5,-5)\:\:\qquad (d) \:\:(\frac{2}{\sqrt 6},\frac{1}{\sqrt 6},-\frac{1}{\sqrt 6})$

$\begin{array}{1 1} (2,1,-1) \\ (2/5,1/5,-1/5) \\ (5/2,5,-5) \\ (\frac{-2}{\sqrt 6} , \frac{1}{\sqrt 6} , \frac{-1}{\sqrt 6}) \end{array} $