The data in the table on the left shows how the ages of the US population were distributed in 1995. Suppose is the fraction of the US population of age less than years old. Find the values of .

 
Age group (in years)Fraction of total population
0-1015% = 0.15
10-2014% = 0.14
20-3014% = 0.14
30-4017% = 0.17
40-5014% = 0.14
50-6010% = 0.10
60-708% = 0.08
70-805% = 0.05
80-902% = 0.02
90-1001% = 0.01
 
(in years)
0
10
20
30
40
50
60
70
80
90
100

You can earn partial credit on this problem.