2 (a) An algorithm will process data from a test taken by a group of students. The algorithm will prompt and input the name and test mark for each of the 35 students. The algorithm will add the names of all the students with a test mark of less than 20 to an existing text file Support_List.txt,which already contains data from other group tests.

1. (a)(i)Describe the steps that the algorithm should perform. Do not include pseudocode statements in your answer.[5]
2. (a)(ii)Explain why it may be better to store the names of the students in a file rather than in an array.[1]
3. (a)(iii)Explain why WRITE mode cannot be used in the answer to part 2(a)(i).[1]
4. (b)Examine the following state-transition diagram. START S1 Input-A | Output-X Input-B S4 S2 Input-B Output-W Input-A Input-A Input-B S3 Input-A | Output-W Complete the table to show the inputs, outputs and next states. Input Output Next state S1 Input-A Output-W Output-W[4]

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.