On average, what is the number of silver medals for nations ranking higher than 7, with a total of 6 medals and fewer than 2 bronze medals?
CREATE TABLE table_57075 (
    "Rank" real,
    "Nation" text,
    "Gold" real,
    "Silver" real,
    "Bronze" real,
    "Total" real
)
SELECT AVG("Silver") FROM table_57075 WHERE "Rank" > '7' AND "Total" = '6' AND "Bronze" < '2'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: On average, what is the number of silver medals for nations ranking higher than 7, with a total of 6 medals and fewer than 2 bronze medals? ### Input: CREATE TABLE table_57075 (
    "Rank" real,
    "Nation" text,
    "Gold" real,
    "Silver" real,
    "Bronze" real,
    "Total" real
) ### Response: SELECT AVG("Silver") FROM table_57075 WHERE "Rank" > '7' AND "Total" = '6' AND "Bronze" < '2'