Find a unit vector in the direction of u.
u= (−5,−12,9)
a. (-5, -12, 9)
b. 1/ squareroot 26 (-5, -12, 90
c. squareroot 26 (-5, -12, 9)
d. 1/ 5 squareroot 10 (-5, -12, 9)
e. 1/5 squareroot 10 (5, 12, -9)
