For the following list, decide how each item affects the calculation of GDP for Macro States in 2015. Please also justify your reasoning as part of your answer. a. A new house is constructed in Macro States during 2015. b. The government purchases new textbooks for the schools of Macro States during 2015. c. Macro States sells 100,000 pounds of beef to Neverlandia during 2015. d. Judy tutors Ellen's children in exchange for Ellen driving the children's carpool three days a week throughout 2015.