A sports competition will be held on this Sunday. Some competitions start at the following times:
8:00 am, 8:50 am, am, 10:30 am, 11:20 am
(1) Fill in the blank with the time pattern.
(2) Tom has two competitions at 8:50 am and 10:30 am. If he finished the first competition at 9:40 am, how long can he rest before he has his second competition? min
(3) What’s the interval between the competitions? min