Architecture: Improve internal ground floor room layout

I attach an architect designed floor plan for all three floors in my house (pdf and autocad dwg formats). This was designed using Autocad. I would like suggestions on how the layout of the ground floor rooms might be improved, taking into account the following requirements: 1) I would like the kitchen to be positioned along the back of the house, so it is facing my back garden. The back of the house is the top of the drawing. Ideally I would like the kitchen to be positioned in the top right of the house, but this is not essential. The kitchen shhould be relatively large (at least 20 squre metres). 2) The position of the garage cannot be moved. Only the length can change, but it has to be a minimum of 2850mm. 3) The positioning of the front door cannot be changed. 4) I would like two completely separate living rooms. 5) I do not want either of the living rooms to be positioned directly at the front of the house. 6) I would like at least one of the living rooms to be of a good size, around 30 square metres. 7) I want to make best use of all the space. It is important that there should be no "watsted space" that is not a useful living space. I am happy for you to provide your room layout suggestions in any drawing format. Regards