Sam is driving down the road at $30\mathrm{m}/\mathrm{s}$. Toni, who is in front of Sam, is driving $25\mathrm{m}/\mathrm{s}$ in the same direction. Toni, watching in her rear-view mirror, sees Sam reach out the window and throw a ball towards her. If Sam sees the ball moving away from him at $10\mathrm{m}/\mathrm{s}$, does Toni see the ball moving towards her, or away from her? How fast is the ball moving according to Toni?

• A. Away from her at $5\mathrm{m}/\mathrm{s}$
• B. Towards her at $5\mathrm{m}/\mathrm{s}$
• C. Away from her at $15\mathrm{m}/\mathrm{s}$
• D. Away from her at $35\mathrm{m}/\mathrm{s}$
• E. Towards her at $35\mathrm{m}/\mathrm{s}$
• F. Towards her at $15\mathrm{m}/\mathrm{s}$