The force shown in the force$-$time diagram acts on a $2\mathrm{.}8kg$ object.

Find the impulse of the force.

Answer in units of $N*s.$

part $2$ of $3$

Find the final velocity of the particle if it is initially at rest.

Answer in units of $\frac{m}{s}.$

part $3$ of $3$

Find the final velocity of the particle if it is initially moving along the $x$ axis with a velocity of $-10\frac{m}{s}.$