Sorry if this has been asked and answered, but what are the FP+ reservation time increments (I know the return time window is an hour but wasn't sure how much you could fine-tune the start time):
quarter hour? (e.g. 10:00, 10:15, 10:30, 10:45, . . .)
10 minutes? (e.g., 10:00, 10:10, 10:20, 10:30 . . .)
5 minutes? (e.g., 10:00, 10:05, 10:10, 10:15 . . .)
quarter hour? (e.g. 10:00, 10:15, 10:30, 10:45, . . .)
10 minutes? (e.g., 10:00, 10:10, 10:20, 10:30 . . .)
5 minutes? (e.g., 10:00, 10:05, 10:10, 10:15 . . .)