Here is a copy of the pre-release material. DO NOT attempt Tasks 1, 2 and 3 now. Use the pre-release material and your experience from attempting the tasks before the examination to answer Question 1. Pre-release material The local high school uses buses to transport students to school. There are six bus routes labelled A to F. You have conducted a survey to analyse the punctuality statistics of these buses over a four-week period. The data from the survey are shown in the table: Punctuality table Day Bus A Bus B Bus C Bus D Bus E Bus F Mon1 0 0 2 1 -1 0 Tue1 0 1 0 0 -1 -5 Wed1 0 0 -1 0 -1 -5 Thu1 2 0 -1 0 -2 -5 Fri1 2 1 -2 0 -4 -4 Mon2 4 2 -2 0 -10 -3 Tue2 0 0 -3 0 -2 -5 Wed2 3 0 -1 0 0 0 Thu2 4 0 0 0 0 0 Fri2 -2 0 0 0 0 0 Mon3 -5 1 -2 2 0 0 Tue3 0 0 0 0 1 -2 Wed3 0 0 1 0 2 -3 Thu3 3 0 1 0 -3 1 Fri3 4 2 1 0 1 1 Mon4 -1 0 1 0 1 1 Tue4 8 0 -1 0 3 0 Wed4 1 1 -1 0 -1 0 Thu4 1 0 2 0 0 -2 Fri4 -2 0 0 0 0 -5 Positive numbers represent minutes early, negative numbers represent minutes late and 0 represents the bus having been on time. Write and test a program or programs for the local high school. • Your program or programs must include appropriate prompts for the entry of data; data must be validated on entry. • Error messages and other output need to be set out clearly and understandably. • All variables, constants and other identifiers must have meaningful names. You will need to complete these three tasks. Each task must be fully tested. Task 1 – Setting up the data storage. Using arrays set up a system to enable data for each bus route to be entered covering each day of a four-week period. It must be possible to enter the data supplied or your own set of data, using suitable prompts as necessary. Task 2 – Working out the statistics. Extend your program so that the following statistics for the four-week period may be calculated and output: • the number of late arrivals for each bus route • the average number of minutes late for each bus route • the bus route with the highest number of days on which it was late • the average number of minutes late for each bus route, using only data from days on which it was late All the results should be displayed with appropriate annotation. Task 3 – Checking specific days. Extend the program as follows: • Allow the user to input a specific day, for example Fri3, to be used for analysis of data. • Find and display how many buses were late on this particular day. • For each late bus, display the route label and how late the bus was on this particular day.

1. (a)(i)State one array you used for Task 1. State the data type and purpose of this array. Array Data type Purpose[3]
2. (a)(ii)State one variable you used for Task 2 and one variable you used for Task 3. In each case, state the data type and purpose of the variable. Task 2 variable name Data type Purpose Task 3 variable name Data type Purpose[6]
3. (b)Write an algorithm to show how you calculated and output the number of late arrivals and the average number of minutes late for each bus route (part of Task 2), using either pseudocode, programming statements or a flowchart.[6]
4. (c)Explain how your program uses the input in Task 3 to only find the data for that specific day (part of Task 3). Any programming statements used in your answer must be fully explained.[3]
5. (d)Explain how you would alter your program in Task 1 to allow you to choose the number of weeks to enter data on bus arrival times.[2]

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.