1. median = sum/8 = 23.6
median: the middle number if data is ordered.
you have and even count, so there is no middle, in that case
add up the two in the middle, then divide by e
so ... (23+25)/2 = 24
mode: the number that appears most often, in your case 25
Looks like you decided to stop after finding the mean.
2. clearly 37,
3. can't make sense out of the posting for #3.
It is very hard to type charts in this format of jiskha.