What is the sum of laps for Karl Muggeridge on a grid less than 16?
CREATE TABLE table_6720 (
    "Rider" text,
    "Bike" text,
    "Laps" real,
    "Time" text,
    "Grid" real
)
SELECT SUM("Laps") FROM table_6720 WHERE "Rider" = 'karl muggeridge' AND "Grid" < '16'
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 sum of laps for Karl Muggeridge on a grid less than 16? ### Input: CREATE TABLE table_6720 (
    "Rider" text,
    "Bike" text,
    "Laps" real,
    "Time" text,
    "Grid" real
) ### Response: SELECT SUM("Laps") FROM table_6720 WHERE "Rider" = 'karl muggeridge' AND "Grid" < '16'