In a particular class, exams are worth 50% of the overall grade, quizzes are worth 30% of the overall grade, homework is worth 15% of the overall grade, and class participation is worth 5% of the overall grade.A particular student has earned an average score of 87.2% on the exams, 78.3% on the quizzes, 90.0% on the homeworks, and 100.0% on class participation. What is this student's overall grade in the course