Number of Final states in minimal FA(NFA)

Question

What will be total number of final states in NFA for the given regular expression?

$R=(a+b)^{*}b(a+b+\epsilon )$

Comments

According to Myhill-Nerode theorem,

No. of equivalence classes = No. of states in Minimal DFA 

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it will be 3.

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I'm also getting the same DFA the ans is going to be 3

Answer 1

Check Above 3 state are there.

And 2 final state.

ans is 2.