Table:
0
A
B
C
D
E
1
Number
Serial Number
Into Service
Withdrawn
Scrapped
2
DH1
573
4/1962
Example
2004
3
DH2
574
4/1962
Example
Feb 1994
4
DH3
575
Example
Example
Oct 1997
5
DH4
579
Example
Example
Sep 1997
6
DH5
580
Example
Example
Sep 1997

Questions and formulas:
Question: Name the into service for dh1
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="DH1"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,A2:A6="DH1"),3))
Level: medium
Question: Name the withdrawn for example and serial number 579
Formula: LET(query1,LET(query1,FILTER(A1:E1,C1="Example"),SUMMARIZE(CHOOSECOLS(query1,4),SUMX(CHOOSECOLS(query1,2)))),FILTER(query1,CHOOSECOLS(query1,2)=579))
Formula2: LET(query1,LET(query1,FILTER(A2:E6,C2:C6="Example"),SUMMARIZE(CHOOSECOLS(query1,4),SUMX(CHOOSECOLS(query1,2)))),FILTER(query1,CHOOSECOLS(query1,2)=579))
Level: hard
Question: Name the into service for dh2
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="DH2"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,A2:A6="DH2"),3))
Level: medium
Question: Name the most serial number for feb 1994
Formula: MAXIFS(B1,E1,"Feb 1994")
Formula2: MAXIFS(B2:B6,E2:E6,"Feb 1994")
Level: easy
Question: Name the number for 2004 scapped
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="2004"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,E2:E6="2004"),1))
Level: medium
Question: Name the into service for dh1
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="DH1"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,A2:A6="DH1"),3))
Level: medium