In a cellular network, cells on average are receiving calls at the rate of 120 calls per hour, and the average length of a red call is 6.25 minutes. What is the offered load in Erlangs of the traffic in the network and what number of channels would 1200 two] tion be required in each cell to guarantee a service of level of 0.01 blocking probability (see Erlang B chart below). [Select Select one or more: G] D a, 24 channels b, 20 channels c. 12.5 Erlangs d, 10 channels e. 6 Erlangs f, 10 Erlangs