MacBook air, keys 4rfv does not work

I have a macbook air M2 (bought around september 2022 and have not had many issues since then). However, when i opened it last week (after not having used it for about 2 weeks) the keys 4 r f v and the search symbol, didn't respond. I restarted it but nothing happened.

Today I tried to update the computer since I hadn't done that in a long time, but it did not work.

What could be the problem and what do I do now?!

How much could it cost to repair?

Help!

Thanks in advance