15. 16. 3 In R³, the standard basis (unit) vector, j can be expressed in component form as: a) (1,0,0) b (0,1,0) c) (0,0,1) d) (1,1,1) = 3t³ – 8t² + 5t, 2 An object moves along a straight line in such a way that its position is s(t) in which t represents the time in seconds. What is the object's acceleration at 1.5 seconds? a) 11 b) -0.375 c) 1.25 d)17