please help me with my homework problems, thank you very much ! ( do not need too many specific working steps)

Question 28 1 pts USE THE INFORMATION BELOW TO ANSWER PROBLEMS 23 AND 29. You are interested in purchasing a new car. One of the many points you wish to consider is the resale value of the car after 5 years of ownership. Since you are particularly interested in the Toyota Camry, you decide to estimate the resale value of the Camry with a 90% condence interval. You manage to randomly obtain data on 17 recently resold 5 year old Toyota Camrys. These '17 cars were resold at an average price of $12,400. Assume the resale value of the Camry after 5 years of ownership is normally distributed. 28. Choose the formula that should be used to calculate the 90% condence interval for the true mean resale value of the Camry after 5 years of ownership. 51)}: %) \"nfs d) Can't answer this question based on the information given. Question 29 1 pts 29. Pick the appropriate 2 or t value used in the above interval. 02:1.64 Ot=1.65 Ot=1.34 O t=1.75 Question 30 1 pts 30. If you have a data set where the smallest resale value in the data set is $11,103 and the largest resale value of the car was $14,697, what is an acceptable estimate for the value of the sample standard deviation of the cars in the sample? Assume answers are rounded to the nearest dollar. 0 $599 0 $625 0 $701 0 Can't answer this question based on the information given