Page1of6143467264048850.docxLab 4: Simulating Phone Number Dialing with Functions DeVryUniversityIn Lab 4 of CIS170C-A4, you are required to develop a phone-dialingsimulationprogram that takes in an 8-character phone number and performs various validationchecks. Write a detailed explanation of the steps involved in creating this program,addressing the following aspects:1.The logic behind the phone number validation, including handling letters,hyphens, and invalid characters.2.The use of functions to pass values by reference and value, particularly how theReadDials(), ToDigit(), and AcknowledgeCall() functions are structured andinteract.3.The handling of errors and providing meaningful error messages to the user.4.How you would test and debug the program to ensure that it meets allrequirements.Word Count Requirement:Your answer should be between 500 and 700 words.Preview Mode
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