 
 <prompt> text: ```Braille na one system wey blind people dey use to write and read wen dem no fit see. E dey write for paper wey get embossed. People wey dey use braille fit read computer screens and other electronic devices because of refreshable braille displays. Dem fit write braille with slate and stylus or type am for braille writer like portable braille notetaker or computer wey fit print with braille embosser.

Braille carry name from the person wey create am, Louis Braille, wey be Frenchman wey lose him sight as pikin. For 1824, when him be 15 years old, he create code for French alphabet to improve night writing. He publish him system wey include musical notation for 1829. The second revision wey he publish for 1837 na the first binary form of writing wey develop for modern times.

Braille characters dey like rectangular blocks wey dem call "cells" wey get small bumps wey dem call "raised dots". The number and arrangement of these dots dey make one character different from another. Because different braille alphabets start as codes for printed writing, the mappings dey vary from language to language. For English Braille, there dey three levels of encoding: Grade 1 - wey be letter-by-letter transcription for basic literacy; Grade 2 - wey add abbreviations and contractions; and Grade 3 - wey get different personal shorthands wey no dey standardized.

Answer this series of questions:

1. Who come up with Braille?
2. E carry him name?
3. When him dey try make night writing better?
4. Wetin him code represent?
5. How old him be that time?
6. Wetin publish for 1937?
7. Wetin happen for 1837?
8. Na the first form of something?
9. During wetin period?
10. Who braille dey meant for?

Numbered answers:``` <response>: ```1. Louis Braille
2. Yes
3. 1824
4. di French alphabet
5. 15
6. unknown
7. second revision
8. binary form of writing
9. modern era
10. blind or visually impaired``` 