Table:
0
A
B
C
D
E
1
Vessel
Origin
Type
In service
Unit
2
Oliver Hazard Perry class
United States
Frigate
2
Anti-Submarine Unit
3
Kobben class
Norway
Submarine
4
Submarine Unit
4
Kilo class
Soviet Union
Submarine
1
Submarine Unit
5
Orkan class
East Germany
Fast Attack Craft
3
Missile Vessels Unit
6
Tarantul class
Soviet Union
Corvette
2
Missile Vessels Unit
7
Project 888
Poland
Training Ship
1
Support Unit
8
Project 281
Poland
Rescue Ship
2
Support Unit
9
Project 5002
Poland
Rescue Ship
2
Support Unit
10
Project 863
Poland
Reconnaissance Vessel
2
Reconnaissance Group

Questions and formulas:
Question: What type of ship is a Kobben class vessel that has been in service longer than 2?
Formula: LET(query1,LET(query1,FILTER(A1:E1,A1="kobben class"),SUMMARIZE(CHOOSECOLS(query1,3),SUMX(CHOOSECOLS(query1,4)))),FILTER(query1,CHOOSECOLS(query1,2)>2))
Formula2: LET(query1,LET(query1,FILTER(A2:E10,A2:A10="kobben class"),SUMMARIZE(CHOOSECOLS(query1,3),SUMX(CHOOSECOLS(query1,4)))),FILTER(query1,CHOOSECOLS(query1,2)>2))
Level: hard
Question: What is the unit for a submarine type ship from Norway?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(C1="submarine")*(B1="norway")),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E10,(C2:C10="submarine")*(B2:B10="norway")),5))
Level: medium