Black Treynor

What do we need to know ? Can we expect some calculation based question on it? The guildeline says otherwise but the pratice question at the end has it. Pls advise if someone had experience on it in mock/practice/last year question?

Book 6 has question on Treynor Black with calculations. I couldn’t get through this stuff, had to revise in more details. I truly admire those guys hit 80s on Book 6, they touch it all.