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A line 'l' passing through the origin is...

A line 'l' passing through the origin is perpendicular to the lines
`l_1: (3 + t ) hati + (-1 +2 t ) hatj + (4 + 2t) hatk` and `l_2 : (3 + 2s )hati + (3+2s) hati + (3+ 2s) hatj + ( 2+s) hatk` ,
Then the coordinate(s) of the point(s) on `l _(2)` at a distance of `sqrt17` from the point of intersection of `l` and `l_(1)` is (are) `(a,b,c)` then `18(a+b+c)` is equal to

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