D. N. Kursanov, a Russian chemist, studied the hydrolysis of the following ester in a 1.0...

D. N. Kursanov, a Russian chemist, studied the hydrolysis of the following ester in a 1.0 M solution of sodium hydroxide, and he was able to prove that the bond that is broken in the reaction is the acyl C — O bond rather than the alkyl C — O bond:

a. Which of the products contained the lsO label?

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b. What product would have contained the lsO label if the alkyl C — O bond had broken?