You are calling your internet provider customer service with a complain about your bill. When you are connected to a representative, it will be, with equal probability, somebody from the billing department, customer retention department or marketing department. When talking to a billing representative, the time until the issue is resolved is distributed uniformly from 10 to 20 minutes. Customer retention specialist will resolve you issue in exactly 2 minutes. Marketing person will first discuss with you promotions and new offers (this time will be normally distributedwithaverage10 minutes and standard deviation 2) and then transfer you to a new representative, who will, again be from one of the three departments with equal probability. What is the expected time that you will spend on the phone?