Why The Characters are not coming properly and Only 0 is working plzzz tell and also make a Fixed one plzzzz

Question

https://code.sololearn.com/cFnPUnS5kUH7/?ref=app

Answer 1

b[ ] ={ 'a' , 'b' , 'c' , 'd' }

Answer 2

Edit this code and Send

Answer 3

If you complete your tutorial respectively get this part then will all clear:

https://www.sololearn.com/learn/Java/2148/