Codominance or Incomplete dominance

(need 2 answers)
Codominance or Incomplete dominance

(need 2 answers)

A child has blood type AB. Which blood types would his parents most likely have?
When two or more alleles for a trait exist in a population. Ex: Different hair colors or blood types
A father that has blood type O is crossed with a blood type O mother. What will be the genotype of the offspring?

In cattle, red (RR) and white (WW) coats are codominant. If you cross two roan (RW) cows, what will their offspring's genotypes be?
white eyed, male
red eyed female (heterozygous)
white eyed female
red eyed male