Need help solving probability questions

Of these patients, 569,142 were not fully vaccinated. Moreover, of a total of 6,748 deaths in this cohort, 6,132 occurred in patients who were not fully vaccinated. In these data, a patient either has COVID-19 or doesn’t have COVID-19, and a patient is either vaccinated, or unvaccinated. Also, the probability of death may not be independent of vaccination status (which can be determined from the data).
a. If I randomly sample two people from the US population who have COVID-19, what is the probability that exactly one of the two is fully vaccinated?
b. What is the probability that one randomly selected person with a COVID-19 infection from the US population will be unvaccinated AND will die?
c. What is the probability that one randomly selected person with a COVID-19 infection from the US population will be unvaccinated OR die?