You are planning a 420- mile road trip. you will drive at a rate of 60 mph. after 2 hours of driving you stop for 15 minutes. after two more hours, you will stop for 30 minutes to eat. two hours later, you will stop for 15 minutes again. you start driving immediately and finish your trip. you car gets 20 miles per gallon and the cost of gas is $2.95 per gallon. if you left at 9 am, at what time would you arrive and how much will you spend on gas. explain your answer.