2. U5. travel exports (goods and services that international travelers buy while visiting the U.S.) are increasing exponentially. The value of such exports, it years after 2011, can be approximated by VG) = 115329009\". V is in billions of dollars. (a) (2 pts) Estimate the values of US travel exports (in billions of dollars) in 2016 and 2018. (b) (3 pts) Howfast is the US travel exports (in billions of dollars per year) growing in 2016 and 2018? (c) (5 pts) How long will it take for the values of US travel exports to double the initial amount