16. The following data represent political party by age from a random sample of registered voters. Republican Democrat Total 17-29 224 184 408 30-44 340 384 724 45-64 1075 773 1848 65+ 561 459 1020 Total 2200 1800 4000 a) Are the events "Republican" and "30-44" independent? Justify your answer and write answer as a simplified fraction. b) Are the events "Democrat" and "65 +" independent? Justify your answer and write answer as a simplified fraction.