Based on the requirements you've mentioned for Sarah's needs, the most suitable option would be a notebook computer. Here's why:
Portability: Sarah needs to access the Internet from anywhere in the city. A notebook computer, commonly known as a laptop, is designed for portability, allowing her to work from different locations and stay connected.
Client Account Management: To keep track of her client's accounts, Sarah would likely need software or applications for customer relationship management (CRM) and accounting. These applications are readily available and compatible with notebook computers.
Photo Editing: Touching up photos of real estate properties requires a computer with decent processing power and a good display. Many modern notebooks offer sufficient hardware capabilities for photo editing tasks.
Versatility: Notebook computers are versatile and can fulfill a wide range of tasks, making them suitable for real estate agents who need to manage accounts, access the Internet, and work with photo editing software.
The other options are not as suitable:
Midrange Server: Servers are typically used for hosting websites, applications, or managing network resources, and are not portable devices designed for individual use.
Embedded Device: Embedded devices are specialized systems designed for specific tasks and are not well-suited for general computing, Internet access, and photo editing.
Docking Station: A docking station is an accessory that allows you to connect a laptop to external peripherals like monitors, keyboard, and mouse. It's not a standalone computing device and wouldn't fulfill all of Sarah's requirements on its own.