Two random samples are selected from two independent populations. A summary of the sample sizes, sample means, and sample standard deviations is given below:n1=20,x¯1=59.6,s1=5.5n2=45,x¯2=77.2,s2=13.6Find a 98% confidence interval for the difference μ1−μ2 of the means, assuming unequal population variances.