If statement #3 above is passed, then this page should be left, with a left margin of 4cm and a right margin of 3cm. The rule applied is "@page: left {margin-left: 4cm; margin-right: 3cm;}".
This paragraph should be right with a left margin of 3cm and a right margin of 4cm. The rule applied is "@page :right {margin-left: 3cm; margin-right: 4cm}".
All other properties of this page should be UA-default.