I need help with this question. I’am so confused.

A woman is taking the father of her daughter to court for refusing to pay child support recently. He has decided that the child can’t be his. Both parents have had blood tests done. The man’s blood type is type AB positive. The mother of the child has type O positive blood, and the child in question has type O negative blood. Both parents are heterozygous for positive blood types.
Complete a dihybird Punnett Square to show the possible outcomes between the mother and the father in question.