user: Question: What average points for highers has 0 has points for ordinary, and ng as the grade, and less than 0 as points for foundation?
Columns: ['Percentage Range', 'Grade', 'Points for Higher', 'Points for Ordinary', 'Points for Foundation']
Types: ['text', 'text', 'real', 'real', 'real']
Sample row: ['90–100', 'A1', 100.0, 60.0, 20.0]
SQL:

assistant: SELECT AVG("Points for Higher") FROM "Table" WHERE "Points for Ordinary" = 0.0 AND "Grade" = 'ng' AND "Points for Foundation" < 0.0;