10 women are fishing all in row in a boat. the center seat of the boat is empty.

[Rosa]

5 women in the front of the? boat want to change seats with 5 women in the back. A person can move from her seat to the next seat if it is empty. or she can step over one person to an empty seat without capsizing the boat. What is the minimum number of moves needed for 5 women in the front to change places with 5 in the back