The graph shows the projected elderly population of a certain country for ages 65dash84 and for ages 85 and older. The formula E = 5.3 StartRoot x EndRoot plus 56.8 models the projected number of elderly people ages 65dash84, E, in millions, x years after 2020. Complete parts (a) and (b) below. Projected Elderly Population in a Country 0 20 40 60 80 100 120 Year Projected Population (millions) 56.7 73.4 81.0 86.1 89.7 2.0 13.0 13.8 17.7 17.8 2020 2030 2040 2050 2060 Ages 65-84 Ages 85+ A side-by-side bar graph has a horizontal axis labeled "Year" with the classes 2020, 2030, 2040, 2050, and 2060 and a vertical axis labeled "Projected Population (millions)" from 0 to 120 in increments of 10. Two vertical bars are above each of the horizontal axis labels, where the left bar represents population for ages 65-84 and the right bar represents ages 85 and older. The heights of the bars are as follows, where the year is listed first, and the heights of the bars are listed next from left to right: 2020, 56.7 and 2.0; 2030, 73.4 and 13.0; 2040, 81.0 and 13.8; 2050, 86.1 and 17.7; 2060, 89.7 and 17.8