Given the reactants in the preceding problem, write the structure of the principal organic...

Given the reactants in the preceding problem, write the structure of the principal organic product of each of the following.

(a) Cyclopentyllithium with formaldehyde in diethyl ether, followed by dilute acid.

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(b) tert-Butylmagnesium bromide with benzaldehyde in diethyl ether, followed by dilute acid.

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(c) Lithium phenylacetylide with cycloheptanone in diethyl ether, followed by dilute acid.