Given Data

1. Input: 45, 12, 36, 19, 28.
2. Step I: 12, 45, 36, 19, 28.
3. Step II: 12, 19, 45, 36, 28.

Question

Which items remain unsorted after Step II?

Answer

45, 36, and 28.

Solution

1. The machine is sorting numbers in ascending order.
2. 12 and 19 have reached their final first and second positions.
3. The remaining sequence 45, 36, 28 is still unsorted.