With your help, Leonard did such a good job that he decided to give up his career in physics

and pursue design. Talking with his friends about the difficulties they face when identifying

differential equations, they decided to create a differential equation scanner app. Since this was

an application for smartphones, Leonard did a bit of research about designing mobile

applications and came across the term $$thumb zone$,$ which Hoober defines as $$the most

comfortable area for touch with one$-$handed use.$$ Trying to make their app

thumb$-$friendly, he set up a personalization system that collects user data and automatically

sorts the bottom menu bar $($or UI Buttons as he calls them$)$ based on the most frequently used

options on the menu.

For example, assume the original order of buttons on the screen are $$Scan$,$Upload$,$Copy$,$

$$More$.$ As Howard uses the app, the app collects Howard$$s data and identifies that $$Upload$$

and $$Copy$$ are used more than the rest of the options. Therefore, the app changes the order of

the buttons accordingly, putting $$Upload$$ and $$Copy$$ where it is easier to reach by thumb. This

personalization is not limited to the testing period, and continues to collect buttons$$ usage data

and reordering the buttons based on frequency of use when actual users will be using them as

well $($hence the personalization$).$

$2.$ Leonard goes on and uses AI models to see if his creative way of personalization would align

with design principles and usability aspects. Ask ChatGPT $($or any other AI model you prefer,

but mention them as the source$)$ whether this method of personalization of the items on the

screen explained above is a good idea. Then provide Leonard with your own rationale whether

ChatGPT$$s explanation is correct or not. Try to draw upon the usability aspects and design

principles you learned in this course.