Answer these questions based on the following paragraph:

Five golfers C, D, E, F and G play a series of matches in which the following are always true of the results. Either C is the last and is the first or C is the first and G is the last. D finishes ahead of E. Every golfer plays in and finishes every match. There are no ties in any match, i.e. no two players ever finish in the same position in a match.