Question

We have A(1; 2; 1), B (1; 2; 3), C (2; 2; 2), pi: x-2y + 2z = 0, d : (x-1)/2= y/(-1)=(z-1)/(-2)

We must show that:
1. Area of triangle ABC
2. Equation of ABC plane
3. Distance from A to pi plane
4. Distance from A to d line
5.Equation of the perpendicular line from A to ABC plane

please help me