Suppose that labor input (worker hours) is increased by 1% next year (with the other inputs held constant). What is the approximate percentage change in output? % Suppose that capital input (number of buses) is decreased by 3% next year (when certain older buses are taken out of service). Assuming that the other inputs are held constant, what is the approximate percentage change in output? % returns to scale appear to characterize this bus transportation system. (Hint: Ignore the issue of statistical significance