The set F, which consists of countries that have won fewer than 100 Bronze medals, can be written using the roster method as F = {C, R, EG}.
The roster method is a method of showing the elements of a set by listing them inside brackets.
The universal set of countries:
Countries Bronze Medals Won
United States (US) 749
Soviet Union (SU) 355
Great Britain (GB) 284
Germany (G) 270
France (F) 293
Italy (I) 228
Sweden (S) 230
China (C) 147
Russia (R) 177
East Germany (EG) 162
Thus, we can conclude that set F includes China (C), Russia (R), and East Germany (EG), because these three are the only countries from the given universal set that have won fewer than 100 Bronze medals.