Define gears, grippers, and motors in robotics. Explain computer generations and provide three file management practices and the likely condition and definition for eye strain from screen use.

4. (a)

• (i) Gears: Gears are used to transmit motion and torque from one part of the robot to another, often changing the speed or direction of rotation.
• (ii) Grippers: Grippers are end-effectors designed to grasp, hold, or manipulate objects.
• (iii) Motors: Motors provide the power or force required for the robot's movement and the operation of its various components.

4. (b)
The term generation of computers refers to the different stages of technological advancement in computer development. Each generation is characterized by significant changes in the underlying technology, architecture, and capabilities, leading to smaller, faster, more powerful, and more efficient computers.

5. (a)
Here are three file management practices Dan should use:

• Create a structured system of folders and subfolders to categorize files (e.g., by project, date, or type).
• Use descriptive and consistent file names that clearly indicate the content of each file.
• Regularly delete or archive old and unused files to reduce clutter and improve search efficiency.

5. (b)

• (i) The student is likely experiencing Computer Vision Syndrome (CVS) or Digital Eye Strain.
• (ii) Computer Vision Syndrome is a condition resulting from prolonged use of digital screens, which can lead to a range of eye and vision-related problems. Symptoms include eye strain, headaches, blurred vision, and dry eyes, caused by the eyes working harder to focus on a screen and reduced blinking.