You are a NASCAR pit crew member. On the day before the Daytona 500, someone ransacks your records and takes all information pertaining to your driver, Darrell Waltrip, as well as the specifics of the car. On race day Darrell is leading the race with 20 laps to go. Y h!! He just finished a pit stop which included refueling to fill up his tank. You know that 25 gallons of fuel (3.5 kg) are in the tank. On the way out of the pits, Darrell radios back to you and asks, "Am I going to have enough fuel to finish the last 20 laps of the race or am I going to have to make another pit stop.