The two data sets in the table below are dependent random samples. The population of (5': y]: differences is approximately normally distributed. x 61 52 51 60 53 63 y 23 2? 25 38 25 35 For all three parts below, round your answers to 3 places after the decimal point, if necessary {a} Find the value of till. a! = l, ,l [b] Find the value of 50-. 5H | {c} Construct a 909:1 confidence interval for the mean difference. |fit is not appropriate to construct a confidence interval in this situation, then enter "0\" in both answer boxes below. 905:3 confidence interval: [I I, I :1