Work of the forces

Two forces $\left(6\hat{i} + 2\hat{j} - 3\hat{k}\right) \si{\newton}$ and $\left(5\hat{i} - 3\hat{j} + 7\hat{k}\right) \si{\newton}$ act on an object that moves on a frictionless surface and, in doing so, displace it from $\left(2\hat{i} + 3\hat{j} - 5\hat{k}\right) \si{\metre}$ to $\left(-3\hat{i} - 3\hat{j} + 4\hat{k}\right) \si{\metre}$.

Find the magnitude of the work done on the object, $W$ in joules.

×