If you want to supress a field in group 4 or 5, then you can try to click on the field, go to "Supress" icon, in CR XI I think it is on 2nd right of "Font Color" Icon.
If you want to supress a section, then right click on left side of report on section you want to supress. In this case, you click on the left side of group section 4 or 5, then click on "Supress No Drill-Down".