From Mechanics

\displaystyle \begin{align} & m=\text{ }0\textrm{.}0\text{8 kg},\quad u=\text{ 6}\textrm{.}\text{26}\text{ m}{{\text{s}}^{-1}} ,\quad v=\text{ }-\text{5}\textrm{.}\text{24}\text{ m}{{\text{s}}^{-1}} \\ & \\ & I=mv-mu \\ & =0\textrm{.}08\times (-5\textrm{.}24)-0\textrm{.}08\times 6\textrm{.}26 \\ & =-0\textrm{.}92\text{ Ns} \\ \\ \end{align}

\displaystyle \text{Magnitude of the Impulse }=\text{ }0\textrm{.}\text{92}\ \text{ Ns}