Student book answers

2 Master clock (hours) Lorries arriving Lorries being unloaded Lorries in queue Lorry hours in queue Loading bay status 05:00 - - 0 0 Free 06:00 Lorry1 Lorry1 0 0 In use 07:00 Lorry1 0 0 In use 08:00 Lorry2 Lorry1 1 1 In use 09:00 Lorry2 0 1 In use 10:00 Lorry3 Lorry2 1 2 In use 11:00 Lorry2 1 3 In use 12:00 Lorry4 Lorry3 1 4 In use 13:00 ... ................
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