low, high, sum, mean

def lowestHighestSum(students):
    sum = 0
    mean = 0
    lowest = students[0]
    highest = students[len(students)-1]
    for i in range(len(students)):
        sum += students[i]
        if lowest > students[i]:
            lowest = students[i]
        if highest < students[i]:
            highest  = students[i]
        if highest < lowest:
            highest, lowest = lowest, highest
    mean = sum /len(students)
    return lowest, highest, sum , mean


lowest = 0
highest = 0
sum = 0
mean = 0

students = [10, 3, 6 , 7, 9, 5, 4]
lowest, highest, sum, mean = lowestHighestSum(students)
print("The scores list is: ", students)
print(f"lowest: {lowest}, highest: {highest}, sum: {sum}, mean: {mean}")