export function calculateAssignmentAverage(...grades) {
    if (grades.length === 0) {
        return 0;
    }

    const total = grades.reduce((sum, score) => sum + score, 0);
    return total / grades.length;
}

export function getTopThree(students) {
    const sorted = [...students].sort((a, b) => b.grade - a.grade);
    return sorted.slice(0, 3);
}

export function uniqueCourses(students) {
    return [...new Set(students.map(({ course }) => course))];
}