Hello again uncle w. I hope I can help you.
11Ac The TV system is PAL - that should give you the answer.
28Dn take a from extra add o and jumble!
As far as 22Dn goes, my advice is to google the two word title and you will discover an important property of the thematic treatment. I assume you are having the same trouble with 35Ac.
Get back if you need further help.