Do it or explain it for "excel sheet" please :)

2. Cynthia is an Exam Supervisor in a college, who has to perform the exam tasks with a team of people. She has observed the time taken to complete each task in minutes that is provided in the table below. She has decided to include a rest allowance of 15%, and delay allowance of 8%. Tasks Sample 1 2 3 4 5 Performance rating % 1 12 6 7 14 10 110 2 22 5 8 9 12 105 3 9 18 8 12 14 95 Find the normal time for each task to be completed