A) if a displacement vector is given as ab = 5x + 2y -6 z and the position vector of a = 1x +0y -1z determine the position vector of b. given two position vectors, a and b (each with unique x, y,z coordinates) show how the displacement vector ab and associated magnitude and unit vector can be obtained. a force act on a charged particles at coordinates (1,3,5) due to a charge at coordinates (2,8,3), calculate the unit vector that describes the direction of this force.