One of the 10 computer manuals published by company T in 2005 was made for home computers  Exactly five of the advertisements released by company T featured those manuals written for home computers
Since 20 advertisements were released by company T in 2006, no more than one-quarter of them featured the computer manuals published by company T in 2005
Some of the advertisements released by company T in 2006 were actually redesigned versions of old advertisements.