Plugins – Custom form with select and input

I need to create a form with a select, where I select and show information about the company in some inputs. Please can someone help me. I have 3 files /> index.php (I know about plugin and add.) lista.php (I have html with select) lista.js (this is for script)

I want you to help me with some example code.

database

id_company ticker name field

1 intl technology

2 nvidia nvidia technology

Select > Show D ticker, when D ticker is selected, show D name and sector in input.

Thanks a lot

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