[
    {
        "min_n": 1,
        "max_n": 10,
        "min_val": 1,
        "max_val": 20
    },
    {
        "min_n": 1,
        "max_n": 15,
        "min_val": 5,
        "max_val": 30
    },
    {
        "min_n": 5,
        "max_n": 20,
        "min_val": 10,
        "max_val": 50
    },
    {
        "min_n": 1,
        "max_n": 15,
        "min_val": 1,
        "max_val": 50
    }
]