Answer:
1) Median
2) Mode
3) Mean
(Hope this is correct :D )
Explanation:
Mode is the number that is most repeated in the data set, and it would best describe the center of the data for the second one.
The first one has an outlier of 50 at the start, so the median would be most appropriate for this.
The last one is basically equal for each value, so the mean would best describe the center for this one.