1.1 According to the rule of 70 , if an economy averages a 4 percent growth rate, it will take about years to double in size. A) 2.8 B) 1,750 C) 0.06 D) 5.7 E) 17.5 (2 points) 1.2 In the Romer model, if an economy's share of researchers decreases, there will be A) an immediate decrease in output and output growth will slow. B) an immediate increase in output and output growth will slow. C) an immediate increase in output and output growth will accelerate. D) an immediate decrease in output and output growth will accelerate. E) no change in output but output growth will slow. (2 points) 1.3 Consider figure 1 . Which of the following year(s) are the approximate trough of a recession? A) 1975 B) 1982 C) 2020 D) All of these answers are correct. E) None of these answers is correct. Figure 1: Unemployment Rate, 1975-2021