In an examination for a class of 30 students the following scores were obtained: 99, 45, 60, 80, 95, 100, 95, 91, 85, 87, 77, 75, 61, 71, 85, 88, 83, 85, 79, 81, 82, 55, 63, 82, 75, 77, 88, 78, 41 & 70 a) Perform the K-S test for the data for lognormal distribution. Is the lognormal distribution acceptable at a 5% significance level? b) Estimate the two parameters using the method of moments and the method of maximum likelihood.