The following data are provided from the SEER Cancer Registries of the National Cancer Institute based on 17 cancer registries in the United States. Data are available for stage of disease at diagnosis for women with breast cancer by age and race.

(a) Please use the appropriate measure of Association to evaluate the relationship between the stage of disease and the race of women with breast cancer who are younger than 50 years of age.(Write down the calculation steps first and then write the R codes to verify)

(b) Please use the appropriate measure of Association to evaluate the relationship between the stage of disease and the age of women with breast cancer.(Write down the calculation steps first and then write the R codes to verify)

Stage of breast cancer at diagnosis by age and race, SEER Cancer data, 1999-2005 Caucasian African females American females