I need help with these questions.....they're from grade 12 geometry and discrete math.

1. Analyse the normal vectors of the following planes and describe the situation of each system. Include a geometric interpretation of each solution:

7x-5y+4z-9=0

-5x+4y+z-3=0

x+2y-z+1=0

2. Analyse the normal vectors of the following planes and describe the situation of each system. Include a geometric interpretation of each solution:

7x-5y+4z-9=0

-x+3y+5z-2=0

5x+y+14z-20=0

3. Determine the parametric equations for a line that is perpendicular to the

yz-plane and passes through X(-2,4,3).

4. If a line and its normal vector with tail at (0,0) intersect at N(-2,5), determine the equation of the line.

5. A line has a scalar equation 5x+2y-10=0. Express the equation of the line in symmetric form.

6. Explain how knowing the normal vectors of two non-parallel planes can be

used to determine the scalar equation of another plane that is perpendicular to the two given planes.

7. Determine whether the two lines intersect and, if so, determine the

point(s) of intersection.