Can you show me the calculation and all of the steps that are used to get the answer for this problem?

Question # 4: Use the data in the output tables below to calculate the effect size, Cohen's D One-Sample Statistics Mean Sid. Deviation Sid. Error Mean SystolicBP Before 20 147.60 10.758 2.405 One-Sample Test Test Value = 115 95% Confidence Interval of Mean the Difference of Sig_(2-tailed) Difference Lower Upper SystolicBP Before 13.552 19 000 32.600 27.57 37.63 A. 13.72 B. 13.56 C. 3.03 (Correct) D. 61.37