A school's automated canteen system assigns tray colours to students based on their lunch selection:
An incomplete flowchart for this algorithm is shown below:

Complete the flowchart by stating what should be written inside:
Decision box A
Decision box B
Process block C
Practise Edexcel GCSE Computer Science Constructs with exam-style questions for GCSE Computer Science. 61 questions covering Structural components of programs and Writing programs with control constructs, matched to the Edexcel GCSE Computer Science (1CP2) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.