12, 13, 15, 20, 24, 25, 26, 31, 33, 34
First, let's just find everything (minimum, maximum, Q₁, median {Q₂}, Q₃)
Minimum : 12, because it is the lowest number.
Maximum : 34, because it is the highest number.
Median (Q₂) : 24.5, because it is the middle number.
Q₁ : 15, because it is between 24.5 and 34
Q₃ : 31
So,
1) d-12
2) c - 34
3) b-15
4) f-24.5
5) a-31
~Hope I helped!~