A river is to be crossed by a girl using a row boat. Assume that the water has uniform velocity, represented above by the vector labeled A.

A river is to be crossed by a girl using a row boat.Assume that the water has uniform velocity, represented above by the vector labeled A. The rowing speed of the girl and a set of possible orientation of her boat are also shown. Select the direction (i.e., H, or F, or ...) in order to cross the river in the shortest time. (Notice that the number of tries is reduced.)D