To determine the width of the shelter, it would help to know the context or details provided in question 1a regarding dimensions or ratios of length to width. Without that specific information, I'm unable to calculate or provide the correct width.
However, based on the options given:
- 3 feet
- 3.25 feet
- 3.5 feet
You mentioned that the width is shorter than the length. If you have more context or numbers from question 1a, please provide them, and I can give a more accurate answer.