Show user the answer_counts in Ending page

**Is your feature request related to a problem? Please describe.**
增加使用者的榮譽感

**Describe the solution you'd like**
呈現已有多少答案給使用者看

設計圖：https://www.figma.com/file/TVAEC28E3ojabGHc8BawbI/%E8%A1%9B%E6%98%9F%E7%A9%BA%E7%85%A7%E5%9C%96?node-id=0%3A2

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