$1.$A body moving with uniform acceleration has a velocity of $16\mathrm{.}1$ cm$/$s when it's coordinate is $4\mathrm{.}51$cm$.$ If it's coordinate $1\mathrm{.}39$s later is $-6\mathrm{.}82$ cm$,$ what is the x$-$component of it's acceleration? Answer in unit's of cm$/$s$^2.$$$

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The initial speed of a body is $4\mathrm{.}19$ m$/$s$.$ What is it's speed after $3\mathrm{.}85$s if it accelerates uniformly at $1\mathrm{.}39$m$/$s$^$s$?$ Answer in units of m$/$s$.$

What is it's speed after $3\mathrm{.}85$s if it accelerates uniformly at $-1\mathrm{.}39$m$/$s$^2.$ answer in units of m$/$s