A man walks on a straight road from his home to a market 5.5 km away with a speed of 5.5 km h Finding the market closed he instantly turns and walks back with a speed of 7.5 km h . What is the average speed and average velocity of the man between t = 0 tot 104 min? a) 6 36 lon h6.36 km h b) 0, 6.36 km 10,0 d) 6.36 km h 0