9. Work & Energy

Two forces, ${\vec{F}}_1=(1.50\hat{i}-0.80\hat{j}+0.70\hat{k})\text{ N}$ and ${\vec{F}}_2=(-0.70\hat{i}+1.20\hat{j})\text{ N}$, are applied on a moving object of mass 0.20 kg. The displacement vector of the object while the two forces act is $\overrightarrow{d}=(6.0\hat{i}-8.0\hat{j}+5.0\hat{k})\text{ m}$. What is the work done by the two forces?