An object moving with uniform acceleration has a velocity of $11\mathrm{.}0$ cm$/$s in the positive x$-$direction when its x$-$coordinate is $2\mathrm{.}79$ cm$.$ If its x$-$coordinate $3\mathrm{.}15$ s later is $5\mathrm{.}00$ cm$,$ what is its acceleration? $($The answer should be in cm$/$s$^2)$