The R# Medical Centre undertook a survey to determine the average waiting time of patients in the surgery before they saw a doctor. From22 responses, the average and standard deviation of the waiting times was found to be19.9 and 6.69 minutes, respectively. Assuming the information was collected through a random sample and that the waiting time is approximately normally distributed, calculate a 98% confidence interval for the mean waiting time at the medical centre. State theupper bound (in minutes) correct to 3 decimal places.