On December $ 17, $ $ 1903, $ at Kitty Hawk, N.C., the $ 1903 $ Wright Flyer became the first powered, heavier-than-air machine to achieve controlled, sustained flight with a pilot aboard. \begin{array}[t]{|l|c|c|c|} \hline{\textbf{December 17, 1903 Flights}}\\\hline &\textbf{Pilot}&\textbf{Time in Flight}&\textbf{Distance}\\\hline \textbf{First Flight}&Orville& 12 ~seconds& 37 ~meters\\\hline \textbf{Longest Flight}&Wilbur& 59 ~seconds& 260 ~meters\\\hline \end{array} The average speed for the first flight was $ x $ meters per second. The average speed for the longest flight was $ y $ meters per second. What is the average of $ x $ and $ y?$ Express your answer as a decimal to the nearest tenth.