3. At the end of 2017, the US had and existing capital stock of $56,215 billion and a labor force of 160 million (0.160 billion): If the read GDP at the end of 2017 was $18,322 billion. Given a Cobb-Douglas production function with an alpha value of 0.259, determine the value for the productivity multiplier (total factor productivity) for the United States in 2017. (2 points)