1. The problem statement, all variables and given/known data Find the work done by the fore F(x,y,z)=xy i = yz j + zx k 2. Relevant equations z=t^3, y=t^2 x=t 0<=t<=1 3. The attempt at a solution I don't understand how to get started because I've got no r(t) so I have nothing to dot product the F(x(t),y(t),z(t)) once the substitution occurs. Does anyone know how to get to the r(t)?