Directions :Study the following information carefully and answer the questions given below:?
A number or alphabet arrangement machine when given an input line of numbers or alphabets rearranges them following a particular rule in each step. The following is an illustration of input and various steps of rearrangement.

And Step IV is the last step of the rearrangement as the desired arrangement is obtained. As per rules followed in the above steps, find out in each of the questions the appropriate step for the given input.?