COMSOL Multiphysics 5.2a Expert needed for Modeling of Acoustics

Please do not waste your time if you don’t know how to do Acoustics modeling using COMSOL 5.2a. I need a COMSOL Multiphysics (Version 5.2a) Expert to do Modeling of Acoustics. I’ll provide all the information, governing equations, and the graphical explanation. What you have to do is to 1) Build a COMSOL model for Acoustics of such a periodic structure. 2) Obtain the wavenumber response and k-ƒ image plot at a certain angle of incidence. 3) Have the capability of varying the angle of incidence and automatically generate the plots. Detailed steps would need to be given for how the modeling is being done. I need to get this done before coming Friday! Budget: $100