Electrical transmission wires which are laid down in winters are stretched tightly to accommodate expansion in summers.
Two such wires lie along the following lines:
l₁:x+1/3=y−3/-2=z+2/-1
l₂:x/-1=y−7/3=z+7/-2
Based on the given information, answer the following questions : Are the lines l₁ and l₂ coplanar(distance is zero)?