If line joining points $A$ and $B$ having positive vectors $6\overrightarrow{a}-4\overrightarrow{b}+4\overrightarrow{c}$ and $-4\overrightarrow{c}$ respectively, and the line joining the points $C$ and $D$ having positive vectors $-\overrightarrow{a}-2\overrightarrow{b}-3\overrightarrow{c}$ and $\overrightarrow{a}+2\overrightarrow{b}-5\overrightarrow{c}$ intersect, then their point of intersection is