The coordinate axes of reference frame S$$S$$ are parallel to those of reference frame SS$,$ and, at time t$=0\mathrm{.}00$st$=0\mathrm{.}00$s$,$ the origins coincide. The velocity of frame S$$S$$ with respect to frame SS is constant and equal to

v$$S$$S$=(2\mathrm{.}21$m$/$s$)$i$+(0\mathrm{.}79$m$/$s$)$j$+(7\mathrm{.}53$m$/$s$)$k$$