select an answer yes or no. Let ( W ) be the set of all vectors ( left[begin{array}{c}x y x+yend{array} ight] ) with

select an answer yes or no. Let \( W \) be the set of all vectors \( \left[\begin{array}{c}x \\ y \\ x+y\end{array}\right] \) with \( x \) and \( y \) real. Determine whether each of the following vectors is in \( W^{\perp} \). 2 answers