How to find the average, median and mode of a group of data?

How to find the average, median and mode of a group of data?

Average: the sum of a column divided by the number of columns
Median: arrange the numbers in this column from small to large. If it is an even number, calculate the average of the middle two digits. If it is an odd number, the middle number is the median
Mode: the most frequent number in this column is mode