Q. Below are some data from the land of milk also honey.

year/price of milk/quantity of milk/price of honey/quantity of honey
2008 $1 100 quarts $2 50 quarts
2009 $1 200 quarts $2 100
2010 $2 200 quarts $4 100

Compute the percentage change in nominal GDP, real GDP also the GDP deflator in 2009 also 2010 from the preceding year. For each year, identify the variable which does not change. Explicate in words why your answer makes sense.