Suppose a country's total factor productivity decreases in a year while its physical capital stock and labor remains constant. If output is plotted on the vertical axis and labor is plotted on the horizontal axis, what would happen to the production function in the case if the economy is best represented by a Cobb-Douglas production function? Q There will be a downward movement along the production function (Le. no shift) 0 There will be an upward movement along the production function (i.e. no shift) 0 There will be a downward shift of the entire production function 0 There will be an upward shift of the entire production function