Table:
0
A
B
C
D
E
1
Episode No.
Airdate
Total Viewers
Share
BBC One Weekly Ranking
2
1
8 April 2010
6,700,000
24.8%
6
3
2
15 April 2010
5,820,000
20.8%
11
4
3
22 April 2010
6,367,000
23.7%
7
5
4
6 May 2010
5,901,000
22.6%
10
6
5
13 May 2010
6,751,000
26.6%
7
7
6
20 May 2010
6,507,000
26.2%
7

Questions and formulas:
Question: What were the air-dates of the episodes before episode 4 that had a BBC One weekly ranking of 6?
Formula: LET(query1,SUMMARIZE(B1,SUMX(A1),SUMX(E1)),FILTER(query1,(CHOOSECOLS(query1,2)<4)*(CHOOSECOLS(query1,3)=6)))
Formula2: LET(query1,SUMMARIZE(B2:B7,SUMX(A2:A7),SUMX(E2:E7)),FILTER(query1,(CHOOSECOLS(query1,2)<4)*(CHOOSECOLS(query1,3)=6)))
Level: hard
Question: What was the total viewership for BBC One weekly rankings larger than 7, before episode 4?
Formula: SUM(FILTER(C1, (E1>7)*(A1<4)))
Formula2: SUM(FILTER(C2:C7, (E2:E7>7)*(A2:A7<4)))
Level: easy