Hello! I really need help with this it's calc and vectors!

1. Thinking: What is the acute angle between these two planes? x = 0 and x + 2y + z-1 = 0 (1 mark) 2. Thinking: Write the equation of a plane in scalar form that is parallel to the y-axis (1 mark) 3. Determine the line of intersection for the following planes. (4 marks) 1: 2x-y-Z-6=0 2: 6x-y-2z-17=0 4. Determine the scalar equation of the plane containing the points: A(3,2,7), B(4,1,-3), & C(-3,2,-5)