Consider a relation Seen(name,bird,place,date) about bird sightings. Each tuple records the name of a birdwatcher who has seen some bird at a certain place on a certain date. Consider the following SQL expression:

with N as (select name, count(bird) as number from Seen group by name) select * from N natural join (select max(number) as number from N)

Which of the following statements are correct?

	1.	This expression returns the names of birdwatchers with the most sightings, together with the number of those sightings.
	2.	This expression returns pairs (name,number) where name is the name of a birdwatcher and number is the number of sightings reported by that birdwatcher.
	3.	An equivalent way to write the same query in SQL is as follows: select name, max(number) from (select name, count(bird) as number from Seen group by name) group by name
	4.	An equivalent way to write the same query in SQL is as follows: with N as (select name, count(bird) as number from Seen group by name) select * from (select name from N) natural join (select max(number) as number from N)
	5.	This expression returns the names of birdwatchers who have seen the largest number of different birds, together with the number of these.