26) A student earned grades of 92, 79, 93, and 74 on her four regular tests. She earned a grade of 79 on the final exam and 88 on her class projects. Her combined homework grade was 87. The four regular tests count for 40% of the final grade, the final exam counts for 30%, the project counts for 10%, and homework counts for 20%. What is her weighted mean grade? Round to one decimal place. A) 83.7 B) 85.0 C) 84.5 D) 84.6