The inequality based on the information given can be expressed as:
\[ 3w < 15 \]
To find William's age, we can solve for \( w \):
- Divide both sides of the inequality by 3:
\[ w < \frac{15}{3} \]
\[ w < 5 \]
This means that William's age must be less than 5 years old. The possible ages for William, which are whole numbers less than 5, are:
- \( w = 0 \) (newborn)
- \( w = 1 \) (1 year old)
- \( w = 2 \) (2 years old)
- \( w = 3 \) (3 years old)
- \( w = 4 \) (4 years old)
Three possible ages for William could be 0, 1, and 2.