Times for a surgical procedure are normally distributed. There are two methods. Method A has a mean of 31 minutes and a standard 9 deviation of 4 minutes, while method B has a mean of 35 minutes and a standard deviation of 2.0 minutes. (a) Which procedure is preferred if the procedure must be completed within 33 minutes? O Method A O Method B Either Method (b) Which procedure is preferred if the procedure must be completed within 41.0 minutes? Method A O Method B O Either Method (c) Which procedure is preferred if the procedure must be completed within 39 minutes? O Method A O Method B Either Method