the following problems. Show your complete solutions 1.The score of SHS students in their First Quarterly Exam in Statistics and Probability were analyzed and found to have a mean of 54.5 and standard deviation of 7.5. Find a 90% confidence interval. 2. The Aptitude Test was administered to random sample of 120 SHS students. The sample mean was 104.2 with standard deviation of 12. Find 99% confidence interval. 3. The average height of randomly chosen 45 female students was 155 cm. with standard deviation of 3.5 cm Find the 95% confidence interval. 4. The average weight of randomly selected 28 adult males was 65kigs. with standard deviation of 2.2 kgs. Find a 99% confidence interval Thanks in advance