An engineer calculates that the magnitude of the axial force

An engineer calculates that the magnitude of the axial force in one of the beams of a geodesic dome is |P|=7.65kN. The cartesian coordinates of the endpoints A and B of the straight beam are (12.4,22.0,18.4)m and (9.2,24.4,15.6)m, respectively.

Express the force P in terms of components.