Which of the following is a unit vector in the direction of (3,4)(3, 4)(3,4)?
(0.6,0.8)(0.6, 0.8)(0.6,0.8)
(3,4)(3, 4)(3,4)
(1,1)(1, 1)(1,1)
(0.3,0.4)(0.3, 0.4)(0.3,0.4)