2. In a family, mother’s blood type is A. Her colo...

2. In a family, mother’s blood type is A. Her color vision is normal. She has five children. Some are born by mother with her first husband who is color blind and with blood type AB, and others are born by mother with her second husband with normal vision and A blood type. These children are: (1) Son, A blood type, color blind; (2) Son, O blood type, color blind; (3) Daughter, A blood type, color blind; (4) Daughter, B blood type, normal vision; (5) Daughter, A blood type, normal vision. Question: Please figure out the father of these five children.