A profit maximising competitive firm has a Cobb-Douglas production function g = [2f1-2 where g is output, L is labour, K is capital and the prices of labour and capital are w and r respectively. Which of the following gives the firm's conditional demand curve for labour when it is free to vary both L and K? Select one: r L= ;q'z l-a .4 . 1-a i=(=) ) @ e q:\" 1 1-a yr.1-a L=(1aa) L_E a _Tq G) e