A completely randomized design to compare k = 4 factor levels has n1 = 11 and 1 = 213.7, n2 = 8 and 2 = 206.3. n3 = 13 and 3. = 205.7, and n4 = 12 and 4 = 215.8. The mean square error is MSE = 11.23. Calculate pairwise confidence intervals for the factor level means with an overall confidence level of 95%. Make a diagram showing which factor level means are known to be different and which ones are indistinguishable.