Please answer 3 questions1.     Choose either an internal or external factor from the competitive forces model for an organization you are familiar with. Explain how it can be used to address how much should be invested on an IT infrastructure.2.     Describe the difference between analog and digital signals. Provide an example of each.3.     Explain the advantages of virtualization over using physical resources for organizations.Provide a reference for each question.Answer each question with 75 words or moreLaudon, K. C., & Laudon, J. P. (2016). Management information systems: Managing the digital firm (14th ed.) [VitalSource Bookshelf version]. Upper Saddle River, NJ: Pearson. Retrieved from