Table:
0
A
B
C
D
E
1
Year
Brand
Category
Total
Rate
2
1/1/2007
BMW
SUV
One
0.3
3
1/1/2008
BMW
Compact
Three
0.8
4
1/1/2009
BMW
Compact
Five
0.6

Questions and formulas:
Question: total rate of bmw
Formula: SUMIFS(E1,B1,"bmw")
Formula2: SUMIFS(E2:E4,B2:B4,"bmw")
Level: easy
Question: average rate of bmw
Formula: AVERAGEIFS(E1,B1,"bmw")
Formula2: AVERAGEIFS(E2:E4,B2:B4,"bmw")
Level: easy
Question: top 3 brand by total rate
Formula: TAKE(SORT(SUMMARIZE(B1,SUMX(E1)), 2, -1), 3)
Formula2: TAKE(SORT(SUMMARIZE(B2:B4,SUMX(E2:E4)), 2, -1), 3)
Level: hard
Question: show total where brand is bmw
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="bmw"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E4,B2:B4="bmw"),4))
Level: medium