8. John is swimming in the river. His swimming velocity was 1.3 m/s due east. The water was running at 0.5 m/s due west. John's projected area in the water was 0.5 m2. Water density was 1000 kg/m3. The coefficient of drag was 0.3. a. What was John's velocity relative to the water? (4 points) b. What was the pressure drag force from the water? (6 points) After a little while, John turned around and now is swimming at 1.3 m/s due west. c. What is John's velocity relative to the water now? (4 points) d. What is the pressure drag force from the water now? (6 points)