1a. A Huawei switching network offered traffic of 600 Erlangs during a 1Hour observation period, the mean holding time was 300 seconds per call, what is the calling rate recorded during the observation period, hence determine the traffic load if the control system was seized for 5 seconds per call?

1b. The gateway switches of Vodafone Ghana limited offers traffic 500 Erlangs in an observation period of 2hours. the mean holding time was 700seconds per call. Evaluate the calling frequency recorded on this switch thus find the traffic load if the control system was engaged for 15seconds for each call?