a. 65 is the median
b. 61.16 or 66.42
c. 2 modes and its 6
explanation step by step
A.) you need to arrange it first lowest to highest : 52, 56, 57, 65, 65, 72, 98
B. add all the numbers and divided by how many are them. as you see there is 2 answers in it, the lowest one is I didn't add the outliner and the high one is outliner is added 98
C. look at the same number.(twice, triple etc)