Combination Locks

Congratulations, your hail storm trick worked! The hail stones only lost 7% during their fall so they were still big enough. The remaining V.A.L.A. agents were freaked out by it and quickly left the island leaving the caged slow lorises behind.

Unfortunately, all the cages are locked with combination locks with four reels labeled 0 through 9. But what's the combination? As you examined one of the locks, you noticed very tiny writing on the back. With your A.A.K.V.O. magnifying glass, you were able to read the following:

• The 1st reel plus the 4th reel equals 3
• The 1st reel is a square number >0
• The 3rd reel plus the 2nd reel is 9 more than the 1st reel plus the 4th reel
• The 3rd reel plus the 4th reel equals the 2nd reel

Can you use the hints above to figure out the combination and free the slow loris?