Ok,
\(g_5(t) \, := \, \left( \begin{array}{r}-20 - 14 \; t \\ -10 - 2 \; t \\ 4 - 5 \; t \end{array} \right)\)
\(P + t_2 \; \left(g_1\left(t_1 \right) - P \right) - g_5\left(t_5 \right)=0\)
\(\left( \begin{array}{r}6 + \left(2 \; t_1 - 11 \right) \; t_2 + 20 + 14 \; t_5 \\ 6 + \left(-2 \; t_1 - 10 \right) \; t_2 + 10 + 2 \; t_5 \\ 2 + \left(t_1 + 2 \right) \; t_2 - 4 + 5 \; t_5 \end{array} \right)=0\)
{t_1 = -1, t_2 = 2, t_5 = 0}
===>
\(k\times h,g_5\, := \, \left\{ \left(-7, -2, 3 \right), \left(-20, -10, 4 \right) \right\} \)
\( k(t) \, := \, \left(-26 \; t - 7, -16 \; t - 2, 2 \; t + 3 \right)\)