vectors help?

[Yoda]

find the vector of magnitude 4 that is parallel to the vector 6i + 2j + 2sqrt(6)k   

Need help with this

[Thorium]

Let u=the given vector
Let v=the vector we need to find

If u and v are parallel, then v=ku, where k is a constant

Therefore, magnitude of ku=4:
(k6)^2+(k2)^2+(k2sqrt6)^2=4^2

Now solve for k, then perform scalar multiplicaton of k and u.
The resultant vector has to be the answer, v