A group of medical students was tested after a week of final exams. They were found to have a lowered antibody count, indicating a suppressed immune system. Which of the following is correct? a) Their antibody count returned to normal in 48 hours.
b) Within 48 hours they were all sick.
c) They still had a low antibody count two weeks later. d) Two weeks later, they still felt very stressed.

In a small, closed economy, national income (gdp) is $350 million for the current year. individuals have spent $100 million on the consumption of goods and services. they have paid a total of $60 million in taxes and the government has spent $75 million on goods and services this year. use this information and the national income identity to answer the questions. how much does the economy spend on investment?