Find the vector and Cartesian equation of the plane that passes throgh the point (1,0,-2) and the normal vector to the plane is `hati+hatj-hatk.`
A. `barr.(hati+hatj+hatk)=-1`
B. `barr.(hati+hatj+hatk)=1`
C. `barr.(hati+hatj+hatk)=-2`
D. `barr.(hati+hatj+hatk)=2`