Q3. Consider the following competing hypotheses and accompanying sample data. H0:12=5,HA:12=5n1=22,n2=18,x1=57,x2=43,s1=21.5,s2=15.2 Assume that the populations are normally distributed with equal variances. (Round your answers to 3 decimal places if needed) a. Calculate the value of the test statistic. b. Find the critical value at the 5% significance level. c. At the 5% significance level, what is the conclusion to the hypothesis test