Find the shortest distance between the lines whose vector equations are

Firstly, consider
⇒ ![]()
⇒ ![]()
⇒ ![]()
⇒ ![]()
⇒ ![]()
⇒ ![]()
So, we need to find the shortest distance between
and
.
Now, We know that
Shortest distance between two lines
and
is
…(i)
Here,
and
⇒ ![]()
Now, ![]()
…(ii)
Now, ![]()
⇒ 
……….(iii)
……….(iv)
Now, ![]()
……….(v)
Now, using (i), we have
The shortest distance between the two lines, 