Hirudo Linnaeus is a leech that can cause a small sore on your skin in humans.  They are found in freshwater lakes including Sylvan Lake, Alberta.  The genes on chromosome 4 and the distance between them are shown in the table below.   Genes Distance 1 and 3 11.1 3 and 2 18.1 2 and 1 29.2 4 and 2 12.1 4 and 3 6.0 What is the distance between gene 1 and 4?

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