(e.g., homework: 18, midterm: 40, final exam: 85). Calculate the average grade for this student using the formula: average_grade = (homework_grade midterm_grade final_exam_grade) / 3. Print the average grade for this student. Repeat steps 1-4 for two more students, each with different grades. Create a variable class_average and calculate the average of the three students' average grades.