Considerthefollowinggrammar: $->$ a bConsider the following grammar:

@$ab$@$b|b$@$a|a$

$->$b$|$ b $->$a$|$ a

Which of the following sentences are in the language generated by this grammar?

$1.$ baab

$2.$ bbbab

$3.$ bbaaaaaS $4.$ bbaab