这道python题要怎么做呢？

ls = [20,49,80,19,32,18,52,89,60,46]
def demo(ls):
    avg = sum(ls)/len(ls)
    result = []
    result.append(avg)
    for i in ls:
        if i > avg:
            result.append(i)
    result = tuple(result)
    print(ls)
    print(result)
demo(ls)