Answer :
Pedro requires 3/2 cup oatmeal for a single batch of granola bars;
Total batches required = 3 1/2 = 7/2 = 14/4 cup
Total oatmeal required = 5 1/4 = 21/4 cup
1 batch requires = (21/4) × (4/14) = 3/2 cup;
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