שאלה בפייתון כיתה ט

1. grades = [97,85,99,73]
for i,grade in enumerate(grades):
print (i,"=>",grade )
2. data = [55,11,44,33,22] for x in range(len(data)-1): data[x] = data[x+1]
print (data )
ולהסביר אותו