Recommend a mechanism that will implement user authentication before an employee can log on to the network. Recommend a method to secure the computers in the accounts department. This should prevent users outside of the accounting group from accessing these machines. Recommend a method for enabling only the users in a department to access the department folder on the file server. Recommend an OS for the servers and for the workstations (these may be different OSs and subgroups may need different machines as well). Describe how each of the OSs chosen will be updated and patched. Justify your choice based on the security of the OS along with cost considerations. Describe the implementation process and timeline for your recommendations. Try to give as reasonable a timeline as possible.