The following table contains 3 variables and 5 observations with some missing values. a. Handle the missing values using the omission strategy. How many observations remain in the data set and have complete cases? b. Handle the missing values ysing the simple mean imputation strategy. How many missing values are replaced? What are the means of x1,x2, and x3 ? Note: For x1,x2, and x3 round your answers to 2 decimal place