Determine whether the given vectors are orthogonal, parallel, or neither.

1. $\mathbf{v} = \langle 1,2,-1 \rangle$ and $\mathbf{w} = \langle -6, -12, 6\rangle$.

2. $\mathbf{v} = \langle 4,6,14 \rangle$ and $\mathbf{w} = \langle 6, -4, 0\rangle$.

3. $\mathbf{v} = \langle 6, 12, -18 \rangle$ and $\mathbf{w} = \langle -18, 12, 6\rangle$.

Note: You only have two attempts at this problem.