Indicate whether each of the following costs of an automobile manufacturer would be classified as direct materials, direct labor, or manufacturing overhead.

(a) ____Windshield.

(e) ____Factory machinery lubricants.

(b) ____Engine.

(f) ____Tires.

(c) ____Wages of assembly line worker.

(g) ____Steering wheel.

(d) ____Depreciation of factory machinery.

(h) ____Salary of painting supervisor.