Good day! Could you please assist me in determining the critical values for the following given the significance value and n? I believe my answers?1.708, 2.845, 1.699, 1.645, and 2.576?were correct, but I'm not so sure. Also, I'd like to know when to utilize the infinity as the degrees of freedom when finding the t-values. Lastly, I want to ask if there is a simpler approach to obtain the t values or rejection region. (What I did was, I divided the level of significance in half (just when it's two-tailed) then look for the intersection of the level of significance and degrees of freedom to obtain the t-value. Thank you on advance!

1. z 2.33 2. 2 -1.645 or z 1.645 3. t -2.145 4 1 - 1.771 ort 1.771 5. 2 -1.28