In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
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Question: Coral reefs make up only _ per cent of the area of the Great Barrier Reef.

Answer: five


Question: Prolactin exists in _ heterogenic forms which possess varying biological activity.

Answer: three


Question: Mediators generateed during mast cell activation are derived in _ ways.

Answer:
three