A、He has built one electric guitar before. B、He knew exactly how to fix a guitar. C、He is learning to build the guitar in Virgin

Jarrin Wildman is trying out the first electric guitar he built at this 12-day workshop at Osborne High School in Manassas Virginia. He says he learned a lot about what it takes to put together a guitar. “If you get one thing wrong even just by a millimeter, then the length of the string won’t be right and you won’t get the correct note on your strings.”
    Although the students use kits to build their guitars which they get to keep, there is still plenty of work for them to do before they can take the instrument home.
    Not all the students play the guitar. Audrey Done’s interests in science brought her to the workshop to understand how a guitar functions.
    “There’s a lot to do with electricity. It’s a lot about grounding and how to conduct it to make music and how much is needed and how to make the notes the way you want it to be, which includes putting the strings on properly and tuning the instrument. It keeps on going high or it keeps on going low. It’s like something out of place when you can’t really tune it.”
    Jenna Davis is feeling a little lost. She gets help from Music for Life founder Skip Chaples. Chaples says while the workshops are about guitar making, they are also about providing the students with other skills. “…science that they may not have had before. But they also learned some very practical skills in woodworking, electronics, assembly and tests, which are good for any of the trades. So youth who have gone through this, they’re getting an education which prepares them for a career through college or going directly into the trades after school.”
    Kevin Hernandez, a guitarist who was his class president hopes his instrument will help him reach for the stars. He appreciates that his parents who are immigrants are encouraging him to follow his dreams. “I’m trying to reach for the stars and trying to slowly progress in society. So we’re living in Chile right now but one day I want to say that I touched the stars and that I made it.” Building a guitar is harder than it looks, says 11-year-old Jaiden Borba.
    “There’s a lot of different steps and don’t think it’s just that, and it’s really easy to build it. It takes time with an effort.” Lessons these students can use in the future no matter where life leads them.
    Question 19. What do we learn about Jarrin Wildman?
    Question 20. Why did Audrey Done go to the workshop to learn how a guitar functions?
    Question 21. To whom did Kevin Hernandez express his thanks?