Blood Types - Phenotypes and Genotypes

Okay - so I know about the blood types, which ones are which, and I know how to fill out a Punnett Square - BUT:

I need to answer the questions in terms of phenotypes and I don't know how to turn Ao and Bo and such from a genotype to a phenotype. Help please!!
Update: *** So, if Ao and Bo both show up in a Punnett square is there a possibility that the child's blood type will be O?
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