Design Loft Room given low headroom

Hi,

I would like someone help me design the top floor room in CAD

Project:
1) create a cross section of top floor loft room to show headroom above 6ft
2) design room so there is enough head room above bed and bathroom (orientation of bathtub / toilet and sink) and lots of storage given sloping ceiling
3) change external side dormer cheeks from 100mm to 300mm

Info:
- cross section, elevations and floorplans provided
- provide PDF copy and updated DWG back