I need solve this questions

QUESTION 5 A Hi-Tech company has introduced a new flash disk. Some dealers and customers have complained that some of the new disks are defective. In order to investigate this the company randomly tested n disks and found that 6.11% were defective. Find the appropriate sample size necessary to achieve a margin of error of 0.050 in order to construct a 97% confidence interval for the proportion of all flash disks that are defective. Round your answer to the nearest integer (whole number). QUESTION 6 Which of the following factor do not affect the width of the confidence interval? Sample standard deviation. Sample size. Sample mean. Critical value. QUESTION 7 Find the confidence level related to the critical value to/2=-1.31 where the sample size n =19. 79.3% 0 93.5% 86.9% 88.1% QUESTION 8 A journal article reports that a random sample of 22 antivirus software packages was used as a basis for calculating a 97% t-based confidence interval for the true mean annual cost of an antivirus software in UAE. The resulting interval was (185 Dhs, 293 Dhs). What is the sample mean cost used when computing the interval? Round your answer to two decimal places. QUESTION 9 At the local car shop, the amount of time required for an oil and filter change on an automobile is right-skewed. A random sample of 64 cars is selected yields a mean of 41 minutes and a standard deviation of 9.74 minutes. What is the margin of error for computing the 96% confidence interval for the populaton mean time? Round your answer to three decimal places. QUESTION 10 Aisha wants to estimate the average study time per week for students in MAT213 course. To accomplish that she randomly selects 28 such students and records their weekly study times in hours. Assume that the weekly study times are right- skewed. Which distribution should be used to construct the confidence interval? t-distribution with 27 degrees of freedom. Standard normal distribution. Neither standard normal distribution nor t-distribution. t-distribution with 28 degrees of freedom