A student has an average of 84% on the unit tests, 85% on the final test, 90% on the class project, and 92% on homework submissions.

If the unit tests count for 25% of the final grade, the final test counts for 40%, the class project counts for 15%, and homework submissions count for 20%, what is the weighted average grade of the student?

• a.) 86.9%
• b.) 87.3%
• c.) 84.5%
• d.) 88%