The data in the table below come from a specific county in North Carolina for the year 2001. How do you compute relative risks/risk ratios (RR) of interest for low birth weight, smoking during pregnancy, and deaths under 1 year of age.

Number Total White Minority Estimated population as of July 1, 2001 301,098 176,961 124,137 Total live births 5,315 3,093 2,222 Fetal deaths 45 21 24 Deaths Total deaths all ages (excluding fetals) 1,989 1,222 767 Under 1 year 56 17 39 Under 28 days 40 9 31 Between 28 and 364 days 16 8 8 Table continued in the portion below. Number Total White Minority Low birth weight 480 201 Mother smoked 279 667 472 195 C-section 1,243 694 549 Source: Selected Vital Statistics for 2001 and 1997-2001, North Carolina State Center for Health Statistics (A-18)