d) Describe each of the five \"Gauss Markov\" assumptions, (define them) and explain in the context of the regression output in 3 b) whether these assumptions are likely to be met in these models. (5 marks) e) Please describe 2 tests for heteroscedasticity and explain what steps you can make in your estimation to deal with heteroscedasticity, if this is present. (2 marks) f) Please include the OECD dummy in the regression output, and interpret it, along with its (2 marks) 1 table [regression outputs]