SELECT AVG("Bronze") FROM table_49688 WHERE "Total" = '4' AND "Silver" < '2'
What is the average Bronze, when Total is 4, and when Silver is less than 2?
CREATE TABLE table_49688 (
    "Rank" text,
    "Nation" text,
    "Gold" real,
    "Silver" real,
    "Bronze" real,
    "Total" real
)