The table below shows the distribution of the population in Flower City by sex and age:

Number of injuries and person-years by sex and age.

Results of a 1-year observation of a cohort of 5,000 people in Flower City
Sex-age	Number	Percent	No. new cases	Person-years
Male
1-45	2300	72%	30	2000
46-80	900	28%	150	680
1-80	3200	100%	180	2680
Female
1-45	330	18%	60	240
46-80	1470	82%	600	1240
1-80	1800	100%	660	1480

1. In this problem, is age a binary, ordinal, or continuous variable?

2. Calculate the incidence rate for the males and the females,respectively,without taking the age distribution of the two populations into account.

3. Calculate the specific incidence rate for each age group for the males and the females,respectively. (Should have 4 total answers)