Please help! ive been stuck on this one for HOURS.... and i just cant get UCL or LCL correct? I dont know what im doing wrong?

In a college advising center, students who recelve help are asked to fill out a survey to show how satiffied they were with the service at the center One of the questions on the survey asks if the students will use this center in future again. The advising center uses the answers to this question to indicate whether their service was useful and as a factor representing the center's ability to meet students' expectation. The number of students (out of 50) who would come back for advice during one semester (16 weeks) are as follows: a. Construct a control chart and determine the upper and lower control limits with (z=3). (Round your answer to three decimal pleces.) Answer is complete but not entirely correct. b. Use median run test to check the randomness in the data (median =44 ). Interpret your results. (Round your answer to three decimal places.) Answer is complete and correct. c. Use up/down run test to check the randomness in the data (median =44 ). Interpret your results, (Round your answer to three decimal pleces.)