1. The problem statement, all variables and given/known data Two coplanar lines l1 and l2 are perpendicular to each other, l1 passes through the points (-3,2,3) and (-8,10,6). Find the equation for l2 if it passes through the point (7,49,25) 2. Relevant equations 3. The attempt at a solution determine the equation of l1 and use the dot or cross product?