{
  "question_id": 5123,
  "hints": [
    {
      "hint_level": 1,
      "hint": "Use the formula: Sum = Average x Number."
    },
    {
      "hint_level": 2,
      "hint": "Average = h, Number = 5."
    },
    {
      "hint_level": 3,
      "hint": "Sum = 5 x h = 5h."
    }
  ]
}