More pets. You’re thinking about getting two dogs and a cat. Assume that annual veterinary expenses are independent and have a Normal model with the means and standard deviations described in Exercise 38.

a) Define appropriate variables and express the total annual veterinary costs you may have.

b) Describe the model for this total cost. Be sure to specify its name, expected value, and standard deviation.

c) What’s the probability that your total expenses will exceed $400?