Draw the curved arrow notation and products for the each elementary step described by the sequence shown here. Note that the products of each step should be used as the reactants in the next step, and you may need to draw in additional reagents as directed. Remember to click on each box to see step-specific instructions. 1. Nucleophilic addition involving H,CH,C 2. Nucleophile elimination ? 3. Nucleophilic addition involving H,CH,C 4. Proton transfer involving H2O