Qual métrica é usada para estimar o tamanho N do programa, de acordo com Halstead?


1 space divided by space left square bracket left parenthesis n subscript 1 divided by 2 right parenthesis space x space left parenthesis N subscript 2 divided by n subscript 2 right parenthesis right square bracket space


n subscript 1 space log subscript 2 n subscript 1 space plus space n subscript 2 space log subscript 2 n subscript 2


left parenthesis 2 divided by n subscript 1 right parenthesis space x space left parenthesis n subscript 2 divided by N subscript 2 right parenthesis space


n subscript 1 space log subscript 2 n subscript 1 space plus space log subscript 2 left parenthesis n subscript 1 space plus space n subscript 2 right parenthesis space


N space log subscript 2 left parenthesis n subscript 1 space plus space n subscript 2 right parenthesis space