The following results come from two independent random samples taken of two populations. Sample 1 Sample 2 n1 = 40 n2 = 35 X1 = 13.6 X2 = 11.8 01 = 2.5 02 = 3 a. What is the point estimate of the difference between the two population means? (to 1 decimal) 1.8 b. Provide a 90% confidence interval for the difference between the two population means (to 2 decimals). c. Provide a 95% confidence interval for the difference between the two population means (to 2 decimals)