An information source is modelled as a band limited process with a bandwidth of 6000 Hz, This process is sampled at a rate higher than the Nyquist rate to provide a guard band of 2000 Hz. The resulting samples take on of the value in the set {-4, -3, -1, 2, 4, 7} with corresponding probability {0.2, 0.1, 0.15, 0.05, 0.3, 0.2}. The rate of information is ________ (in kbps)