1Aggregation data before clear(): 2 3 0 500 4 1 700 5 2 900 6 3 1100 7 4 1300 8Aggregation data after clear(): 9 10 0 0 11 1 0 12 2 0 13 3 0 14 4 0 15Final aggregation data: 16 17 0 1500 18 1 2700 19 2 2900 20 3 3100 21 4 3300 22 23