If the initial concentrations in the bag are [PL] = 0, [L] = 0, [P] = 4 and the surroundings are [PL] = 0, [L] = 12 and [P] = 0, What is the Kd given that the equiLiBrium of the left is [PL] = 2, [L] = 5, [P] = 2 and the equiLiBrium of the right is [PL] = 0, [L] = 5 and [P] = 0?