The exponential models describe the population of the indicated​ country, A, in​ millions, t years after 2006. a.Which country has the greatest growth​ rate? b.By what percentage is the population of that country increasing each​ year?

Country 1​: Upper A equals 145.9ₑ⁻⁰.⁰⁰³ ᵗ
Country 2​: Upper A equals 1097.7ₑ⁰.⁰¹⁶ ᵗ
Country 3​: Upper A equals 28.6ₑ⁰.⁰²² ᵗ
Country 4​: Upper A equals 130.2ₑ⁰.⁰⁰⁵ ᵗ