Calculate the work done by the field \(\mathbf{F}\) when the object moves along the given path from the initial point to the final point.

\(\mathbf{F}(x, y, z)=\langle x, y, zangle, \mathbf{r}=\langle\cos t, \sin t, tangle\) for \(0 \leq t \leq 3 \pi\)