The table below lists infant mortality in Maryland in 2007 and the estimated racial breakdown of the U.S. population according to the 2000 census. Calculations should be done by hand, but feel free to use software or Excel to check your work. The total U.S. population is 281,421,906.

race	Infant mortality (per 1000 births) - Maryland 2007	% of U.S. population (2000)
White	4.6	75.1
Black	14.0	12.3
Hispanic	3.8	12.5

a.If possible, calculate the crude infant mortality rate for Maryland (all races).

b.Calculate the race-adjusted infant mortality rate for 2007 Maryland using the U.S. population in 2000 as the standardizing population.

c,The U.S. population is 281,421,906. Is that needed to solve this problem?