$\backslash$table$[[$From$,$To $($$$),],[$Denver$,$New York,$],[$Detroit$,1400,600,],[$Atlanta$,1600,900,],[$From$,$To $($$$)],[$Los Angeles,Chicago,Philadelphia$],[$Denver$,1200,1000,1700],[$New York,$3000,800,100]]$

Solve the LPs in question $(1)$ and question $(2)$ using GAMS, show your GAMS files.