A firm's production function is given by Q = 4L^{0.6}K^{0.4}. The firm currently uses the input combination L = 1,000 and K = 1,000. Which of these combinations of L and K lies on the same isoquant?
L = 500; K = 2,828.43
L=2,828.43; K = 528.43
L= 500; K = 2,000
☐ L = 828; K = 1,172