#### Answer

a) The lower bound will be below 0, which is not possible for the proportion.
b)p is between 0 and 0.075.

#### Work Step by Step

a) We can't find the intervals because the lower bound will be below 0, which is not possible for the proportion.
b) By using the Rule of Three, the upper bound: $\frac{3}{n}=\frac{3}{40}=0.075.$ The lower bound cannot be negative, hence it is 0, hence p is between 0 and 0.075.