Question: A problem with a phone line, which is preventing a customer from receiving or making calls, is upsetting to both the customer and the telecommunications

A problem with a phone line, which is preventing a customer from receiving or making calls, is upsetting to both the customer and the telecommunications company. The file < PHONE >

contains samples of 20 problems reported to two different offices of a telecommunications company and the time to clear these problems (in minutes) from the customers’ lines:

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