Table:
0
A
B
C
D
E
F
1
#
Episode
Writer
Director
Viewers(millions)
Original airdate
2
7
Episode 1
Mike Bullen
Tom Hooper
8.08
26September1999
3
8
Episode 2
Mike Bullen
Tom Hooper
7.95
3October1999
4
9
Episode 3
Mike Bullen
Tom Vaughan
7.96
10October1999
5
10
Episode 4
Mike Bullen
Tom Vaughan
8.64
17October1999
6
11
Episode 5
Mike Bullen
Pete Travis
9.14
24October1999

Questions and formulas:
Question: What's the writer of Episode 1?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,B1="Episode 1"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,B2:B6="Episode 1"),3))
Level: medium
Question: What's the total number of episodes both directed by Tom Hooper and viewed by 8.08 million viewers?
Formula: SUM(FILTER(A1, (D1="Tom Hooper")*(E1=8.08)))
Formula2: SUM(FILTER(A2:A6, (D2:D6="Tom Hooper")*(E2:E6=8.08)))
Level: easy
Question: What's the original airdate of the episode directed by Pete Travis?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,D1="Pete Travis"),6))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,D2:D6="Pete Travis"),6))
Level: medium
Question: How many millions of viewers did watch Episode 5?
Formula: SUMIFS(E1,B1,"Episode 5")
Formula2: SUMIFS(E2:E6,B2:B6,"Episode 5")
Level: easy
Question: What's the total number of directors whose episodes have been seen by 9.14 million viewers?
Formula: LET(query1,SUMMARIZE(D1,SUMX(E1)),FILTER(query1,CHOOSECOLS(query1,2)=9.14))
Formula2: LET(query1,SUMMARIZE(D2:D6,SUMX(E2:E6)),FILTER(query1,CHOOSECOLS(query1,2)=9.14))
Level: hard