So it looks like the numbers are already in numerical order, that's good. The median is simply the middle number. I shouldn't have to help you find that. If there are 2 middle numbers, take the average and that's the median.
To find mean, you need a calculator. Add up all the numbers, and then divide by 10, since there's 10 numbers total. That's the mean.
The mode is 99, because that's the most frequent number. It appears twice.
The range is the span of the data set. To find this, take the largest number (99) and minus the smallest number (1). This is the range.
