a. If potential GDP for the first quarter of 2013 = $75.8 billion, and real GDP for the first quarter of 2013 = $80.3 billion, then the output gap was..........?(Please show your work)

b. (Assume that for the fourth quarter of 2012, nominal GDP was $245 billion, potential real GDP was $260 billion, and the GDP deflator was 112. According to Okun's law, the cyclical unemployment rate during the fourth quarter of 2012 was....?

c. Suppose for every dollar change in household wealth, consumption expenditures change by $0.05. If real household wealth declines by $45 billion, potential GDP is $120 billion, and the multiplier effect for the second year after an expenditure shock is 1.1, what is the total change in output relative to the potential for the second year?