What is the object's displacement, in Cartesian unit-vector notation, between times 1s and 3s? Your answer should be in meters, but do not enter units for your equation.
(a) (2i + 3j + 4k)
(b) (3i + 2j + 4k)
(c) (4i + 3j + 2k)
(d) (3i + 4j + 2k)