Homing pigeons avoid flying over water. Suppose a homing pigeon is released on an island at point C, which is 8 mi directly out in the water from a point B on shore. Point B is 18 mi downshore from the pigeon's home loft at point A. Assume that a pigeon flying over water uses energy at a rate 1.21 times the rate over land. Toward what point S downshore from A should the pigeon fly in order to minimize the total energy required to get to the home loft at A?