Calculate the mode for the variable : age : 18, 18, 19, 19, 20, 20, 20, 21, 22, 23 2. You have decided to code the variable income as an ordinal variable; therefore, you have coded working class as 1, middle class as 2, and upper class as 3. Calculate the median for the variable income: 1, 2, 1, 2, 1, 2, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 2, 2, 3