Please explain all part of the question. 32

ALBERTA eClass The Plizer-BioNTech vaccine is one of the recommended vaccines for preventing COVID-19 illness. It is claimed that no more than 1 of 3 9% of people who received two doses will show (a) sign(s) of infected illness. Suppose 30 out of a random sample of 400 Calganans who received two doses of Pfizer-BioNTech show at least one sign of infected illness. Let p be the proportion of Calgarians who received two doses of Pfizer-BioNTech with no sign of infected illness. a. To use the sample data to support the researcher's claim, what are the null and the alternative hypotheses? Ho: p 0.91 O Ho: p $ 0.075 vs. HA: p > 0.075 O Ho: p s 0.09 vs. HA: P > 0.09 O Ho: p = 0.09 VS. HA: P