grades with function

const gradesTask =  function (data) {

let { course , minPassingGrade, students } = data;

const avrageGrade = function (grade) {
    let avrage = 0;
    for (let i = 0; i < grade.length; i++) {
        avrage += grade[i];
    }
    return +(avrage / grade.length).toFixed(1);
}

const hasPassed = function (score) {
    return score > minPassingGrade;
}

let passedStudents = [];
let avrageCourse = 0;
let score = 0;

students.forEach(el => {
    score = avrageGrade(el.grades);
    if(hasPassed(score)) {
        passedStudents.push({name: el.name, score: score});
        avrageCourse += score;
    }
});

if (avrageCourse != 0 && passedStudents.length != 0) {
    avrageCourse /= passedStudents.length;
}

let obj = {course, minPassingGrade, courseAverage: avrageCourse, passedStudents}

return obj;
}