$3\mathrm{.}1$ Install the Ubuntu GNOME desktop environment using the terminal on an existing Ubuntu installation. Configure the system to boot into the GNOME desktop environment by default.$(4$ marks$)3\mathrm{.}2$ Install and configure two specific GNOME Shell extensions $($applets$)$ of your choice from the official GNOME Extensions website. These applets should serve practical purposes for TechCorp's employees.$(12$ Marks$)3\mathrm{.}3$ Describe the purpose and functionality of each applet. Provide clear instructions on how to install and configure each applet using the GNOME Extensions website and the GNOME Tweak Tool. Ensure that each applet is functional and serves its intended purpose, to verify that the applets you have created are functional, provide screenshots showing that the applet is functioning correctly as intended.$(12$ Marks$)3\mathrm{.}4\mathrm{.}1$ Customize the Ubuntu GNOME desktop environment using the GNOME Tweak Tool system settings$\mathrm{.}3\mathrm{.}4\mathrm{.}2$ Modify the desktop theme to a theme of your choosing$\mathrm{.}3\mathrm{.}4\mathrm{.}3$ Set up a custom screensaver of your choosing$\mathrm{.}3\mathrm{.}4\mathrm{.}4$ Adjust the system fonts and icon sizes for better readability.