Final answer:
The question presented does not provide sufficient information to calculate the percentage of Peter's workout spent swimming; therefore, no answer can be provided.
Step-by-step explanation:
The provided information does not contain direct details about Peter's workout routine or the time spent swimming, making it impossible to accurately determine what percentage of his workout is spent swimming based on the provided solutions. As a mathematics problem, normally one would calculate the percentage by dividing the time spent on swimming by the total workout time and then multiplying by 100 to get the percentage. However, with the lack of required data, we cannot complete this calculation.
Since the question presented is missing the data necessary to calculate the percentage, no options (a) 11%, (b) 15%, (c) 17%, or (d) 19% can be confirmed as the correct answer. To help Peter or any student accurately determine the percentage of the workout spent swimming, detailed information about the duration of the swimming portion and the total duration of the workout is essential.