1 Line \(l _ { 1 }\) has Cartesian equation
$$l _ { 1 } : \quad \frac { - x } { 2 } = \frac { y - 5 } { 2 } = \frac { - z - 6 } { 7 } .$$
- Find a vector equation for \(l _ { 1 }\).
Line \(l _ { 2 }\) has vector equation
$$l _ { 2 } : \quad \mathbf { r } = \left( \begin{array} { c }