GENERAL INSTRUCTIONS: SOLVE THE FOLLOWING. WRITE COMPLETE AND NEAT SOLUTIONS. WRITE LEGIBLY AND USE BLACK INK ONLY. A. Find the confidence intervals for the population mean from the given data. 1. x = 5.8,n = 36,0 = 1.2, confidence level = 95% 2. x = 108, n = 50,a = 26, confidence level = 90% 3. x = 300, n = 18, s = 15, confidence level = 99% 4. * = 15000, n = 20, s2 = 7150, confidence level = 90% B. Solve the following. 1. A sample size of 100 grade 9 students has a mean age of x = 16 years and the population variance is 16. a. What is the point estimate for the population mean? b. Find the 95%% confidence interval for the population mean. c. Find the confidence interval for the population mean with confidence level of 99%