Please help me only if you really know how to solve it as I am stuck and I cannot solve these questions. Dont give me random answers please. You can use any software to solve it if it's easier ( we use R). If I am satisfied, i will also make sure you are satisfied too.

Link to textbook if needed with the content: https://drive.google.com/file/d/1ptM7Pzw8e364cZpwdQXU30GVhrQc1AZ7/view?usp=sharing

Questions:

Suppose we are carrying out a hypothesis test on a population mean, where the population is normally distributed and the population variance is unknown. We are using the appropriate STAT'204O methods. Which of the following statements are true? There may be more than one correct statement; check all that are true. O a) We should use the t procedure. but only if n