can you please answer letters A and B. (Compute effect size and test whether or not tutoring is effective at a 0.05 level of significance.

A statistics tutor wants to assess whether her remedial tutoring has been effective for her ve students. She decides to conduct a related samples ttest and records the following grades for studenls prior to and after recelvlng her tutorlng. l l 2.6 3.0 . ' 3.1 'l as l 3.0 l 3.2 l l, 2.8 ,..,3-7 \"l (a) Test whether or not her tutoring is effective at a 0.05 level of signicance. State the value of the test statistic. (Round your answer to three decimal places.) t= State the decision to retain or reject the null hypothesis. o Retain the null hypothesis. @ Reject the null hypothesis. J (b) Compute effect size using estimated Cohen's d. (Round your answer to two decimal places.) (\"