sing the project bennye_class.RData that you created in Assignment #0, verify (using the sum command with the na.rm=T option) that the sum of the height column is equal to 24354. Work through this example on R and then do the following: (a) Using the project bennye_class.RData that you created in Assignment #0, find a 93% confidence interval for the average height (in inches) of a person in this class (height). (b) Which of the following statements is true regarding part (a)? Problem #5(a): confidence interval enter your answer in the form a,b (A) The population standard deviation \sigma must be known. (B) The population must follow a t-distribution. (C) The population cannot follow a t-distribution. (D) The population mean must be inside the confidence interval. (E) The population must be normal. (F) The population does not need to be normal because the sample size is greater than 30.