For a speed something like corresponding to Froude number 0.1 or 0.5 after which wave resistance will start taking off, and when it takes off, see the friction resistance would go like this, so this wave resistance curve that we had previously drawn this will be added to that, and this will be to the power of four, speed to the power of four, am I clear? So, this is the nature of wave resistance, wave making resistance of a ship and the wave making resistance coefficient can be represented as I have shown you.