for this partice question could you help me to fix the mistake im confuse fro red part

Take 5 = ( 1, 2 ) (3 . 1 ) 2 = ( 2 , 3 ) 14.5). let 6 , Q E H = > 6 = 0 2 = E Also 6 , a both are disjoint X Then o ( 6 2 ) = Icm Co(6) , . (d) ) = Icm ( 2 , 2), Ste, d+ E = 2 62 GAZ & A7 is finite. and Bod GH B group. so Hmust be subgrey f AZ and a close propety