1. The problem statement, all variables and given/known data Find 2 unit vectors u1, u2, lying in the plane, x-y+z=0, which are not parallel to each other. 3. The attempt at a solution I've tried taking the unit vector of the normal vector <1,-1,1> which is <1/rad(3),-1/rad(3),1/rad(3)>, but my teacher has told me it is not in the plane. Then for my second vector, I created a parallel vector, but then I reread the question and found out they are not supposed to be parallel.