For the lines defined by the following four sets of symmetric equations

L1: $\displaystyle {\left({x}\right)}=\frac{{{y}+{2}}}{{5}}=\frac{{{z}+{4}}}{{-{{6}}}}$
L2: $\displaystyle {\left({x}-{1}\right)}=\frac{{{y}-{18}}}{{5}}=\frac{{{z}+{10}}}{{-{{6}}}}$
L3: $\displaystyle \frac{{{x}-{12}}}{{4}}=\frac{{{y}-{58}}}{{20}}=\frac{{{z}+{76}}}{{-{{24}}}}$
L4: $\displaystyle \frac{{{x}-{2}}}{{2}}=\frac{{{y}-{6}}}{{25}}=\frac{{{z}-{7}}}{{-{{6}}}}$



Which of the lines are parallel?



Which of the lines are identical?