I usually do 3-4 minutes depending on how difficult the passage is and spend anywhere from 45 seconds to a minute answering the questions. In total, you should dedicate about 8:45 seconds per passage.
That not be a question I'd be comfortable answering or hearing the answer to.. After all the race is long and hard and in the end, it's only with yourself. But that's just me.
The use of lawgic really depends on what question type you're answering. Typically, people write down the lawgic for MBT and MSS question types. It's also helpful to at least draw the logical structure for PF and parallel question types.
Depends... I've not had that happen to me... people have... I think the trick is to test like there's no pressure... like you're answering another PT...