need the step

10. Determine the intersection point (if it any) of the following planes: (6 marks) x+y+ 2z =-2 3x - y+14z =6 9. A trough is formed by bending a 4m wide piece of metal into segments as shown. What angle 0 will maximize the cross-sectional area (and thus the capacity) of the trough? (5 Marks) 1 m m 2 m