python question:

5.29 Write function lastfirst that takes one argument-a list of strings of the format LastName, FirstName> and returns a list consisting two lists: (a) A list of all the first names (b) A list of all the last names >>>lastfirst(C'Gerber, Len', Fox, Kate', 'Dunn, Bob']) C'Len', 'Kate', Bob', Gerber' 'Fox, 'Dunn']1