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Addition Reactions of Aldehydes & Ketones

Draw the major product from each of the reactions shown below. In reactions 2, 3 & 4 assume an acid catalyst is present, and that water is also formed.
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 1.
Reaction 1: benzaldehyde plus HCN, asking for the major product (cyanohydrin)
2.
Reaction 2: cyclopentanone plus ethylene glycol, acid catalyzed, asking for the major product (cyclic acetal)
3.
Reaction 3: cyclohexanone plus pyrrolidine, acid catalyzed, asking for the major product (enamine)
4.
Reaction 4: isobutyraldehyde (CH3)2CHCHO plus hydroxylamine, acid catalyzed, asking for the major product (oxime)

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