Creating an NFA Diagram where one of the last three chars is an 'a'

Question

having some trouble with this question creating an NFA, would appreciate some help

L consists of all words over {a,b}

has an 'a' as one of the last 3 characters in the word

the length of the words can be less than 3

'a' is in the language, while 'bb' is not in the language

Answer 1

try this one.....may be helpful......