A short, thin rod of length 2.5 cm has charge distributed uniformly along its length. The rod is coaxial with and centered inside a much larger, uncharged cylindrical can. The flux through the curved part of the can is +65 N*m^2/C, and the flux through the bottom circular face is +45 N*m^2/C. What is the flux through the top cylindrical face of the can? What is the value of the linear charge density of the rod?