Table schema:
CREATE TABLE table_name_30 (overall INTEGER, name VARCHAR, pick__number VARCHAR, round VARCHAR)

Question: Which Overall is the average one that has a Pick # larger than 7, and a Round larger than 4, and a Name of glen howe?
SQL: SELECT AVG(overall) FROM table_name_30 WHERE pick__number > 7 AND round > 4 AND name = "glen howe"