Which one of the following macro-economic variable should be excluded in a Keynesian model of a closed economy without government

How can the government use the Keynesian perspective to improve unenployment?

dont answer by pen paper

Economics In terms of Classical Economics and not Keynesian: World trade has boosted growth rates in many countries. In around 1980, mainland China opened its economy to trade and foreign investment. The Chinese also implemented many institutional reforms promoting capitalism. 1) Calculate Chinese pre-reform cumulative and annualized growth rates from 1950 to 1979. 2) Calculate Chinese post-reform cumulative and annualized growth rates from 1980 to 2019. 3) Please explain the differences in your calculated numbers using the changes the Chinese government implemented. Hint: Use Classical Economic fundamentals to determine the pre-reform cumulative and annualized growth rates for the above years and then explain them. The GDP and growth rates can be found online in many different places.