1. Harrison, Carla, and Fred are housepainters. Harrison and Carla can paint 100 square feet per hour using a standard paintbrush, and Fred can paint an square feet per hour. What is the average labor productivity, in terms of square feet per painter-hour, for the three painters taken as a team? Assume that the three painters always work the same number of hours. 2. True or False: An increase in gas prices raises the demand for cars. 3. The supplv of national saving depends on A. The saving decisions of households and businesses B. The scal policies of the government C. The saving decisions of households and businesses and the fiscal policies of the government D. The saving decisions of businesses 4. True or False: A low-saving, high-spending country is Iikelv to import more than a high-saving country. Please answer these four questions above