\text { 2i Find the work done by } \bar{F} \text { along the curve } \vec{r}(t) \text { (c) } \bar{F}(x, y)=\left\langle x^{3} y, x-y\right\rangle, \vec{r}(t) \text { is

the parabola } y=x^{2} \text { from }(-2,4) \text { to }(1,1) \text {, }