A submarine can be treated as an ellipsoid with a diameter of 5 m and a length of 25m. Copyright o The MoGrawitia Companies, inc. Permission requred for reproducion a display a) What is the drag force on the submarine when it is cruising at a steady horizontal velocity of 40km/h in seawater (=1025m3kg,=1103Pas) ? b) State what assumption you made about the type of flow around the submarine while doing this calculation and give your reasons for making that assumption. Show whether your assumption was correct. c) If the submarine's length was shortened to 5m, would the drag force increase or decrease? How can you tell? How would flow separation be different for the shorter submarine, and why does that affect the drag force? Be detailed in your