Southwest Airlines is considering buying a new Boeing $737.$ The airplane will cost $25$ million dollars today and then generate $9$ million dollars per year for the next $10$ years. After $10$ years, the airplane will not generate any cash for Southwest Airlines. If the cost of capital is $9\%,$ what is the NPV $($in millions of dollars$)$ of buying the new airplane?

$($Enter your answer in millions. i$.$e$.5\mathrm{.}5$ million, not $5,500,000)$