Construct a Decision Tree for a Process Specification

Tom is reviewing the process for his firm's expense reimbursement policies with the new salesperson, Mary.

"Our reimbursement policies depend on the situation. You see, first we determine if it is a local trip (i.e., a trip within Arkansas). If it is, we only pay mileage, meals and hotel. We do not allow to use airplane for the local trip. If it is an out-of-state trip, we check if the employee flies. If the/she does, we pay airfare, hotel, meals and taxi. If the employee uses a car, we pay mileage, meals, hotels and parking. If the local trip takes less than 4 hours, we only pay mileage."