Answer
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Work Step by Step
a. From an ergonomic perspective, the smartphone zooming technique of using double touch-spread or double touch-pinch is more intuitive and ergonomic for users because it mimics a natural hand gesture of spreading or pinching, which is easier and more comfortable to perform compared to manipulating a separate slider or navigating through menus or toolbars on a desktop computer.
b. In terms of cognetics, the smartphone zooming technique aligns better with users' mental models and expectations, as it leverages the touchscreen interface to directly manipulate the content on the screen using gestures that are already familiar from everyday interactions with physical objects. This makes the interaction more seamless and reduces cognitive load compared to the desktop method, which requires users to navigate through separate controls or menus.
