just 4 and 5 since my other one was not takin any more awnsers

Answer:
4. O+ donors to O- donors.
5. B+ to A- donors.
Step-by-step explanation:
Just try to find the numbers on the chart and then find which type of donor the number matches with. Hope this helps!
Answer:
4. O+ donors to O- donors.
5. B+ to A- donors.
hope this helps
Step-by-step explanation: