21. Determine an equation for the line of intersection of the following planes: 3x + 2y + 5z = 4 and 4x - 3y +z=-1. (3 marks)22. The equation of a plane is [x, y, z] = [-1, -1, 1] + $[1, 0, 1] + ([0, 1, 2], s, t, E R. Find the intercepts of the plane. (3 marks) X-5+! 23. The point (*, 0, 3) lies on the plane { ) = 5-! , S, t E R.. Find the value of k. (2 marks) 2=1+5+1