Can you tell me the sun of Population that has the Country/Region of hong kong, and the Rank smaller than 2?
CREATE TABLE table_name_45 (
    population INTEGER,
    country_region VARCHAR,
    rank VARCHAR
)
SELECT SUM(population) FROM table_name_45 WHERE country_region = "hong kong" AND rank < 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: Can you tell me the sun of Population that has the Country/Region of hong kong, and the Rank smaller than 2? ### Input: CREATE TABLE table_name_45 (
    population INTEGER,
    country_region VARCHAR,
    rank VARCHAR
) ### Response: SELECT SUM(population) FROM table_name_45 WHERE country_region = "hong kong" AND rank < 2