In column E$,$ use the appropriate text function to return the position of the comma character located in the data in column D$.$ Copy the formula down through cell E$21.$ Hint: Do not use the optional argument

In column F$,$ use the appropriate text function to return to the length of the text in column D$.$ Copy the formula down through cell F$21$

In column G$,$ use the appropriate text function to extract only the last name from column D$.$ Copy the formula down through cell G$21.$ Hint: Do not use nested functions