Hello

Could you please help me?

I need to find:

An unit vector parallel to the line $\displaystyle x=3t + 1, y=16t-2, z=-(t+2) $

An unit vector orthogonal to the plane $\displaystyle x-6y+z = 12$

An unit vector orthogonal to the planes $\displaystyle 8x+y+z = 1$ and $\displaystyle x-y-z = $

Thanks