These questions were a bit more complicated than the previous ones, because the rock layers were not necessarily flat, and there were faults and intrusions and other such complications to work out. You were asked to write up as complete a geologic history as possible, based on the rock units that you could see. In Question 3, this was relatively simple, because not much really has happened, but in Questions 4 and 5, there were (for example) angular unconformities with an unknown amount of missing time. Provided you made it clear that such an event happened, you did fine.