Determine the moment of the force F about point O. The force has coordinate direction angles \alpha, \beta, \gamma. Express the result as a Cartesian vector.
Given:
F = 20 Ib\quad a = 8 in
\alpha = 60 deg\quad b = 6 in
\beta = 120 deg\quad c = 6 in
\gamma = 45 deg\quad d = 10 in