Rogerio drives 1 hour and 18 min to meet a friend. the first 30 min of his trip was mostly highway driving, so he averaged 64 miles per hour for this portion. for the last 48 min of this trip, he averaged 50 miles per hour. what was his average speed for the entire trip?A) 60 miles per hourB) 58 miles per hourC) 55 miles per hourD) 53 miles per hour