(1) To determine the Mode, you simply take the value that occurs MOST FREQUENTLY
(2) To determine the median, you first arrange the data set in order from least to greatest. Next you take the value that occurs in the middle of the data set, that is count the same numbers from the left extreme and also from the right extreme. Where the total number of data provided is an even number, you'll end up with two numbers in the middle. In this case, you take both and divide by 2, and the result is your median.
(3) You can determine the range by first arranging in order from least to greatest. Then you take the least value and the greatest value and find the difference between both. That is, range equals greatest value minus least value.
(4)