In a relay event, four swimmers swim 100 yards, each Swimmer Mean SD C using a different stroke. A college team looks at the times 1 (backstroke) 50.36 0.21 for the swimmers and creates a model based on the assumptions that the swimmers' performances are 2 54.93 0.22 independent, each swimmer's times follow a normal (breaststroke) model, and the means and standard deviations of the 3 (butterfly) 48.85 0.24 times in seconds are as shown in the table. Complete parts a) and b). 4 (freestyle) 44.03 0.23 a) What are the mean and the standard deviation for the relay team's total time in this event? (Round to two decimal places as needed.)