what is the highest silver when the total is 4 and bronze is less than 1?
CREATE TABLE table_64068 (
    "Rank" text,
    "Gold" real,
    "Silver" real,
    "Bronze" real,
    "Total" text
)
SELECT MAX("Silver") FROM table_64068 WHERE "Total" = '4' AND "Bronze" < '1'
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: what is the highest silver when the total is 4 and bronze is less than 1? ### Input: CREATE TABLE table_64068 (
    "Rank" text,
    "Gold" real,
    "Silver" real,
    "Bronze" real,
    "Total" text
) ### Response: SELECT MAX("Silver") FROM table_64068 WHERE "Total" = '4' AND "Bronze" < '1'