In order to find the g-factors, we use the formula: g = mu / I (where mu is expressed in nuclear magnetons). For the ground state of Cd-111, this results in -0.59485 / (1/2) = -1.1897. For the 245 keV level of Cd-111, we find -0.766 / (5/2) = -0.306.
For the free electron, we find 1 / (1/2) = 2.
For the free neutron, we have -3.826 / (1/2) = -1.913.