Final answer:
To recommend a decision, analyze if the car can achieve the target MPG on the highway using premium fuel.
Step-by-step explanation:
To recommend a decision to the automobile manufacturer, we need to determine if the car can achieve the objective of 25 estimated highway MPG using premium fuel. The manufacturer can use the model developed in part (e) to analyze this. If the model shows that the car can achieve at least 25 MPG on the highway using premium fuel, then the manufacturer can decide to design the car to use premium fuel. However, if the model indicates that the car cannot achieve the target MPG with premium fuel, then the manufacturer should consider using a different fuel or modifying the design to improve fuel efficiency.