Order the list of numbers from least to greatest.
8.8 × 1021 , 6.2 × 102 , 2.8 × 1021 ,
1.5 × 102 , 5.1 × 1012
6.2 × 102, 1.5 × 102, 5.1 × 1012,
8.8 × 1021, 2.8 × 1021
1.5 × 102, 2.8 × 1021, 5.1 × 1012,
6.2 × 102, 8.8 × 1021
8.8 × 1021, 2.8 × 1021, 5.1 × 1012,
6.2 × 102, 1.5 × 102
1.5 × 102, 6.2 × 102, 5.1 × 1012,
2.8 × 1021, 8.8 × 1021