The table below gives the growth statistics for the USA in the last 15 years. Output per worker hour Capital Stock per worker Labor Supply Labor share in earnings Growth Rate (% per year) 1.23% 0.83% 0.44% 0.60 Capital Share in Earnings 0.40 (3) Assuming greater efficiency induced more investment what share of the growth of output per worker-hour is explained ultimately by increasing efficiency? [Select] (3) Assuming greater efficiency induced more investment what share of the growth of output per worker-hour is explained ultimately by increasing efficiency [Select] 100% 73% 76% 0% 74% (4) If the return on capital is constant, what was the expecte percent)? [Select]