Introduction An operating system is the most important software that runs on a computer. It manages the computer's memory and processes, as well as all of its software and hardware. It also allows you to communicate with the computer without knowing how to speak the computer's language. Without an operating system, a computer is useless. Assignment 1.You have been asked to copy the birthdays.txt file from a USB flash drive to the backup folder on the C: volume on a computer that runs UNIX but you don't know the UNIX command for copying files. How can you find what command to type? Research UNIX. What is it? 2.Suppose you want to try out Linux by installing it on an older computer and using it to browse the web, send and receive email, and run Apache OpenOffice. Which distribution will you get and why? Research the available distributions, determine which one you need. 3.Your school just updated to Windows. What happened to the old software and why does windows 10 look so different? Microsoft created the Windows operating system in the mid-1980s. There have been many different versions of Windows, but the most recent ones are Windows 10 (released in 2015), Windows 8 (2012), Windows 7 (2009), and Windows Vista (2007). Windows comes pre-loaded on most new PCs, which helps to make it the most popular operating system in the world. 4.You have a MAC. The MAC OS (previously called OS X) is a line of operating systems created by Apple. It comes preloaded on all Macintosh computers, or Macs. Some of the specific versions include Mojave (released in 2018), High Sierra (2017), and Sierra (2016). MAC users account for less than 10% of global operating system - much lower than the percentage of Windows users (more than 80%). One reason for this is that Apple computers tend to be more expensive. However, many people do prefer the look and feel of macOS over Windows. 1.List 4 Operating systems and basic information for each. 2.Explain an operating system and what it does. 3.Which operating system do you use and why?