Defining command with asterisk

Question

I have a command which takes multiple arguments, one of which is a star:

\NewDocumentCommand{\foo}{ s m m }{
    \IfBooleanTF{#1}{Asterisk is here.}{Asterisk is not here.} #2 #3.
}

I would like to define another command which works like the first one, but with some predifined arguments, like

\NewDocumentCommand{\baz}{ s m }{
    \IfBooleanTF{#1}{
        \foo*{#2}{a}
    }{
        \foo{#2}{a}
    }
}

\baz and \baz* work in the same way, so I would like to somehow define \baz without repeating the {#2}{a} part two times. I have tried

\NewDocumentCommand{\baz}{ s m }{
    \expandafter\foo\IfBooleanT{#1}{*}{#2}{a}
}

but it doesn't work. Complete MWE

\documentclass{article}

\usepackage{xparse}

\NewDocumentCommand{\foo}{ s m m }{
    \IfBooleanTF{#1}{Asterisk is here.}{Asterisk is not here.} #2 #3.
}

\NewDocumentCommand{\baz}{ s m }{
    \IfBooleanTF{#1}{
        \foo*{#2}{a}
    }{
        \foo{#2}{a}
    }
}

\begin{document}

    \baz{b}

    \baz*{c}

\end{document}

Answer 1

As TeX works by macro expansion, there is no need to have all of the arguments for \foo in the conditional, so we can just have the unique part:

\documentclass{article}

\usepackage{xparse}

\NewDocumentCommand{\foo}{ s m m }{%
    \IfBooleanTF{#1}{Asterisk is here.}{Asterisk is not here.} #2 #3.%
}

\NewDocumentCommand{\baz}{ s m }{%
    \IfBooleanTF{#1}%
      {\foo*}%
      {\foo}%
        {#2}{a}%
}

\begin{document}

    \baz{b}

    \baz*{c}

\end{document}