Consider the following graph of the aggregate production function

Real GDP per worker (constant dollars) $120,000 90,000 60,000 30,000 B Productivity using 2010 technology Productivity using 1940 technology 0 10 20 30 40 50 60 70 80 90 100 Physical capital per worker (2000 dollars) 2.1 Assume the economy is at point A. Identify the point on the graph that represents what happens when the economy gains more physical capital. 2.3 What does diminishing returns to physical capital mean? 2.2 Now the economy is at the point identified in part (1). Identify the point that represents what happens when the level of technology within the economy increases.