Alternatively, using the relationship \( c = 9a - 5 \) and \( a = 1 \), we confirm \( c = 4 \). To express the relationship between \( a \) and \( c \), recall that \( c = 9a - 5 \), which determines \( c \) uniquely in terms of \( a \), but from the constraint, we find that with \( b = -6 \), the only consistent value is \( a = 1 \), so the relationship is: - Nelissen Grade advocaten