Please write out step by step how I can find the 95% confidence interval and how to find degrees of freedom. Thanks

Hint(s) Check My Work Consider the following results for independent random samples taken from two populations. Sample 1 Sample 2 n1 = 10 12 = 30 I1 = 22.6 I2 = 20.7 $1 = 2.5 $2 = 4.2 a. What is the point estimate of the difference between the two population means (to 1 decimal)? 1.9 b. What is the degrees of freedom for the t distribution (round the answer to the previous whole number)? 26 c. At 95% confidence, what is the margin of error (to 1 decimal)? 2.3 d. What is the 95% confidence interval for the difference between the two population means (to 1 decimal and enter negative value as negative number)? 1.1 4.9