Work with the dot product

A body undergoes the displacement $\vec{s}=(3.0\hat{ı}+4.0\hat{ȷ})\mathrm{m}$ under the action of the constant force $\vec{F}=(5.0\hat{ı}-2.0\hat{ȷ})\mathrm{N}$. Compute the work of the force and the angle between the force and the displacement.