A state employee drove from Lake Charles to a conference in Baton Rouge. A totaldistance from the round trip was 240 miles. The time required to travel one way to BatonRouge was two hours. Due to heavy traffic during the return trip to Lake Charles, anextra hour was required. How much slower was the state employee traveling on thereturn trip? 1. 20 mph slower 2. 15 mph slower 3. 10 mph slower 4. None of the above.