i didnt understand where to write the formula and what to do

2. The following table contains the first names, middle names or initials, and last names of several people. Use Excel formulas to transform these names so that the last name appears first, followed by a comma, followed by the first and middle names in Column G and the format as shown in column H. Input table ADAM KEEFE HOROVITZ ANNETTE CHRISTINE ANDREALLO DERROLL LEWIS THOMPSON GLORY ANNE CLIBBERY HAZEL JOYCE WILLETT MALIAMPURACKAL CHACKO PUNNOOSE Output required Horovitz, Adam Keefe