The usual estimate that each human-year corresponds to 7 dog-years is not very accurate for young dogs, since they quickly reach adulthood. A more accurate formula for converting human-years x into dog-years is shown below. The following function expresses dog-years as 10-- dog-years per human-year for the first 2 years and then 4 dog-years per human-year for each year thereafter. F ( x ) = 1 10.5x if 0 5 x 5 2 21 + 4(x - 2) if x > 2 (a) Find the number of dog-years corresponding to the following amounts of human time: 8 months, 1 year and 2 months, 3 years, 10 years. 8 months dog-years 1 year and 2 months dog-years 3 years dog-years 10 years dog-years