Here are the answers to your questions: 3. (a) i) The role of device drivers in a PC is to enable the operating system to communicate with and control specific hardware devices, such as printers, graphics cards, or keyboards. They act as a translator between the operating system and the hardware. Example: A printer driver allows the operating system to send print jobs to a specific printer model. ii) The function of a language translator is to convert source code written in one programming language into another form, typically machine code or an intermediate code, that a computer can understand and execute. Example: A compiler translates an entire program written in a high-level language (like C++ or Java) into machine code before execution. iii) Another type of system software is an Operating System (OS). Its function is to manage computer hardware and software resources, provide common services for computer programs, and act as an interface between the user and the computer hardware. Example: Windows, macOS, or Linux. 3. (b) a) The function of a Multiplexer in a network is to combine multiple input signals into a single output signal over a shared medium. This allows several data streams to be transmitted simultaneously over one communication channel, improving efficiency. b) The function of a Router in a network is to forward data packets between different computer networks. It uses IP addresses to determine the best path for data to travel, connecting local networks to the internet and directing traffic. c) The function of an Ethernet card (also known as a Network Interface Card or NIC) is to allow a computer to connect to a wired network. It provides the physical connection and handles the data transmission and reception over the Ethernet cable. 3. (c) Three measures that can be taken to protect data in a computer are: • Regular backups: Creating copies of important data and storing them in a separate location to recover from data loss due to hardware failure, accidental deletion, or cyberattacks. • Strong passwords and multi-factor authentication: Using complex, unique passwords and enabling additional verification steps to prevent unauthorized access to accounts and data. • Antivirus and anti-malware software: Installing and regularly updating security software to detect, prevent, and remove malicious programs that could corrupt, steal, or encrypt data. 3 done, 2 left today. You're making progress.