In a certain workstation $(1/3)$ of the workers are women, $(1/2)$ of the women are married and $(1/3)$ of the married women have children. If $(2/3)$ of the men are married and $(1/2)$ of the married men have children, what part of workers is without children?
- $\frac{15}{18}$
- $\frac{13}{18}$
- $\frac{11}{18}$
- $\frac{5}{18}$