Answer:
Mean = 40.75
Median = 36.5
No mode.
Step-by-step explanation:
We are given the following data:
52, 25, 15, 0, 104, 44, 60, 30, 33, 81, 40, 5
Formula:

Sorted data: 0, 5, 15, 25, 30, 33, 40, 44, 52, 60, 81, 104

Mode is the most frequent observation in the data.
Since all the observations repeated exactly once, there is no mode.