5. Below are examples of biological reactions. Kindly draw a reasonable reaction mechanism using curved arrows. (a) Me Me ཅ ོག་ལ་ཐན་དང་ ི OPP H₂C OPP + + CO₂ (b) H₂C. H₂C CH₂ Me H₂O H₂C HO CH₂ Me + H₂O* (c) Me Me R Et Et CO₂ HO CH3 OH Page 136

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