Good day Satistical Methos Tutors , I would like some detailed explained solution to the following exercise

An advocacy group targets a well-established clinic in Kingston to determine whether there is a difference between the level of care (on a scale from I to 10) patients think they receive and the level of care the nurses believe they provide. The advocacy group believes that the nurses are overstating the level of care provided to each patient seen. Below is a list of 12 clinic rooms from which representatives of the advocacy group took ratings from both the nurse and the patient after the patient was seen. Room# Nurse's Rating Patient's Rating 90 5.0 8.O 8.5 7.0 6.0 9.5 85 5.6 4.0 10.0 7.3 92 9.0 6.0 7.0 7.0 5.0 10 5.0 7.0 8.6 6.0 12 73 5.0 a) What is the standard error of the mean difference in level of care ratings?i) Create a 99% confidence interval for the mean difference in level of care ratings