Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE school_bus (years_working INTEGER)
### Question:
What is the maximum, minimum and average years spent working on a school bus?
### Answer:
SELECT MAX(years_working), MIN(years_working), AVG(years_working) FROM school_bus