The three printed unlettered blocks are identified below by navigation labels 1, 2 and 3. Their mark allocations are 10, 10 and 5 respectively.
The printed opening block offers a choice of two protocols for 8 marks in total. All three choices are solved here. Sections 1 and 2 below identify the subsequent unlettered blocks, worth 10 and 7 marks respectively; these section numbers are navigation labels.

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