Need help to solve the below pasted problem from chapter 9.1 of Triola stats. Please provide explanation and how to solve problem using TI-84 calculator :

In a large clinical trial, 394,965 children were randomly assigned to two groups. The treatment group consisted of 197,022 children given a vaccine for a certain disease, and 27 of those children developed the disease. The other 197,943children were given a placebo, and 90 of those children developed the disease. Consider the vaccine treatment group to be the first sample.

c. If a 0.05 significance level is to be used to test the claim that p1