Can someone plz help me

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.

Factor the polynomial by its greatest common monomial factor.

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?