The following modifications were made:

- SVG color names are not permitted by the XSL recommendation;
  they were replaced by the equivalent calls to rgb() function:
  
    darkred - rgb(139, 0, 0)
    wheat - rgb(245, 222, 179)
    
- Absolute paths to images were replaced by relative ones.
  (One image is missing from the set: ex03.jpg).
  
- In some places, spaces between inlines and brackets were 
  removed to ensure proper line breaking.