2. (4 pts) U.S. travel exports (goods and services that international travelers buy while visiting the US.) are increasing exponentially. The value of such exports, t years aer 2011, can be approximated by VG") = 115.321.9039\". V is in billions of dollars. (a) Estimate the values of US travel exports (in billions of dollars) in 2016 and 2018. (b) How fast is the US travel exports (in billions of dollars per year) growing in 2016 and 20] 3