All variables, constants and other identifiers must have meaningful names. Section A You are advised to spend no longer than 40 minutes answering this section. 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 A shop sells a range of mobile devices, SIM cards and accessories as shown in the table: Category | Item code | Description | Price ($) ---------|-----------|-------------------------------------------------|----------- Phone | BPCM | Compact | 29.99 Phone | BPSH | Clam Shell | 49.99 Phone | RPSS | RoboPhone - 5-inch screen and 64 GB memory | 199.99 Phone | RPLL | RoboPhone - 6-inch screen and 256 GB memory | 499.99 Phone | YPLS | Y-Phone Standard - 6-inch screen and 64 GB memory | 549.99 Phone | YPLL | Y-Phone Deluxe - 6-inch screen and 256 GB memory | 649.99 Tablet | RTMS | RoboTab - 8-inch screen and 64 GB memory | 149.99 Tablet | RTLM | RoboTab - 10-inch screen and 128GB memory | 299.99 Tablet | YTLM | Y-Tab Standard - 10-inch screen and 128 GB memory | 499.99 Tablet | YTLL | Y-Tab Deluxe - 10-inch screen and 256 GB memory | 599.99 SIM card | SMNO | SIM Free (no SIM card purchased) | 0.00 SIM card | SMPG | Pay As You Go (SIM card purchased) | 9.99 Case | CSST | Standard | 0.00 Case | CSLX | Luxury | 50.00 Charger | CGCR | Car | 19.99 Charger | CGHM | Home | 15.99 Write and test a program or programs for this shop. • 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 arrays, 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 system. Write a program to: • use appropriate data structures to store the item code, description and price information for the mobile devices, SIM cards and accessories • allow the customer to choose a specific phone or tablet • allow phone customers to choose whether the phone will be SIM Free or Pay As You Go • allow the customer to choose a standard or luxury case • allow the customer to choose the chargers required (none, one or both may be purchased) • calculate the total price of this transaction • output a list of the items purchased and the total price. Task 2 - Allow a customer to order multiple mobile devices. Extend Task 1 to: • offer the customer the opportunity to purchase an additional mobile device • if required, perform bulleted steps 2 to 7 of Task 1 for each additional mobile device and calculate a running total for the customer • once no further devices are required, output the total the customer will need to pay. Task 3 - Offering discounts. Extend the program to allow a discount of 10% off the price of every additional phone or tablet purchased. Output the new total the customer will need to pay and the amount of money saved.

1. (a)(i)Identify two arrays you could have used for Task 1 and, in each case, state its purpose.[4]
2. (a)(ii)Identify two variables you could have used for Task 1 and, in each case, state its purpose.[4]
3. (b)Explain why the item code data could not be stored as a real data type and identify the most suitable data type for the item code data.[2]
4. (c)Write an algorithm to show how you input your choice of mobile device and SIM card (part of Task 1), using either pseudocode, programming statements or a flowchart. It is not necessary to show initialisation or setting up of arrays containing product details.[5]
5. (d)Explain how your program completes Task 3. Any programming statements used in your answer must be fully explained.[5]