Repeat the analysis shown in Example 5.3 for finding the location of a decision boundary using the

Question:

Repeat the analysis shown in Example 5.3 for finding the location of a decision boundary using the following information:
(a) The prior probabilities are P(Crocodile) = 2 × P(Alligator).
(b) The prior probabilities are P(Alligator) = 2 × P(Crocodile).
(c) The prior probabilities are the same, but their standard deviations are different; i.e., σ(Crocodile) = 4 and σ(Alligator) = 2.