A square is cut horizontally into four equal-sized pieces and arranged in a flat line. Assume Retr = 5x105, U = 2 m/s, and l = 1.5 m. If air at 20°C and 1 atm flows over the plates (only on the top side): a. Find the location where transition from laminar to turbulent flow occurs. b. Calculate the ratio of total drag force for case (a) with respect to case (b). c. Calculate the drag force on segment ii.