A $14$N force with a fixed orientation does work on a particle as the particle moves through displacement d $=(4$i $-4$j $+5$k$)$ m$.$ What is the angle between the force and the displacement if the change in the particle's kinetic energy is $($a$)+10\mathrm{.}6$ J and $($b$)-10\mathrm{.}6$ J$?$