An ecologist was interested in tracking the temperatures for five days in four different cities located at different altitudes (based on number of metres above sea level) this winter. He recorded the temperatures in degrees Celsius in the table below (notice the negative temperatures): Altitude Days 5000m 4000m 1000m 2000m Day 1 -12 -6 Day 2 -5 -6 11 Day 3 -11 -1 -9 AddOL Day 4 1 -10 2 Day 5 -13 -7 He found that the total sums of squares in the data was 745. Using this information, answer the following questions: (i) What is/are the independent variable(s): (iii) How many levels of the independent variable(s) are there: (iii) What is/are the dependent variable(s): (iv) How many observations were recorded for each level of the independent variable(s)