The graph below approximates the net force exerted westward on a $9\mathrm{.}71$ g bullet in the barrel of a hunting rifle after it is fired. Note that the time axis begins at $0\mathrm{.}5{10}^{-4}$ s$.$

Using the data from the graph, calculate the change in velocity of the bullet from time $5{10}^{-4}s$ to $11{10}^{-4}s.$

$3\mathrm{.}4{10}^2\frac{m}{s}[W]$

$6\mathrm{.}8{10}^2\frac{m}{s}[W]$

$]$

$93\frac{m}{s}[$W$]$