Karyn is running in the Boston Marathon with an average speed of 3.35 m/s. The density of the air is 1.2 kg/m3 , Karyn’s cross-sectional area is 0.50 m2 , and the coefficient of drag is 1.1. As Karyn approaches Heartbreak Hill, the head wind picks up to 2 m/s. a) Calculate drag force that Karyn experiences. b) As she faces the headwind, Karyn instinctively crouches to reduce her cross-sectional area to 0.45 m2 . What is the new drag force that Karyn experiences? c) Can the flow of the air as it passes Karyn be described as laminar flow or turbulent flow? Why?