The bar graph shows the number of fatal vehicle crashes per 100 million miles driven for drivers of various age groups. The number of fatal vehicle crashes per 100 million miles, N, for drivers of age x can be modeled by the following formula. N=0.014x2 1.21x+28.23 Fatalities/100 Million Miles According to the formula, what age groups are expected to be involved in 4 fatal crashes per 100 million miles driven? year-olds. (Round to the nearest integer. Use a comma to separate answers as needed.) Age of Drivers and Fatal Crashes 18- 12.5 12- 11,0 9.6 6.7 4.0 3.0 2.1 8.7 20.0 16.2 16 18 20 25 35 45 55 65 75 79 Age of Drivers