the Bureau of Labor Statistics reported that the United States labor force labor force was 164,746,000 persons in August of 2022. As- suming that 2.5% of the labor force is engaged in R&D at an efficiency rate of 1/300 per million persons per year: (a) If R&D is the only source of total-factor productivity growth what is the growth rate of labor efficiency in the United States? (b) If the growth rate of total factor productivity is 0.8% per year, what is the value of a in the Cobb-Douglas production function?