Be sure to answer all parts. coumarin, a naturally occurring compound isolated from lavender, sweet clover, and tonka bean, is made in the laboratory from o−hydroxybenzaldehyde by the reaction depicted below. determine a stepwise mechanism for this reaction by selecting the letter corresponding to each step of the mechanism. coumarin derivatives are useful synthetic anticoagulants. a b c d e f g h step [1]: step [2]: step [3]: step [4]: step [5]: step [6]: step [7]: step [8]: