$\backslash$table$[[$Year$,\backslash$table$[[$LRD Total Airline$],[$Enplanements$]],\backslash$table$[[$Southwest Region$],[$Enplanements$]],$Market Share$],[,,5-$Year Average,$],[15,,93,167,307,],[20,,110,022,766,],[30,,143,846,242,]]$

Develop a forecast for Year $15,20,$ and $30$ using a $10-$year average market share and complete the blank table below.

$\backslash$table$[[$Year$,\backslash$table$[[$LRD Total Airline$],[$Enplanements$]],\backslash$table$[[$Southwest Region$],[$Enplanements$]],$Market Share$],[,,10-$ Year Average,$],[15,,93,167,307,],[20,,110,022,766,],[30,,143,846,242,]]$

How does $10-$year average market share forecast differ from that using the $5-$year average market share?

Which of these two forecasts would you select and why?

$1$