Perform the Analytic Hierarchy Process $($AHP$)$ on the following manager judgments. Are these judgments consistent or inconsistent?

$\backslash$table$[[,$Durability Warranty,Service,Functionality,$],[$Durability$,1,3\mathrm{.}9,3\mathrm{.}5,4],[$Warranty$,,1,2\mathrm{.}7,0\mathrm{.}18],[$Service$,,1,0\mathrm{.}4,],[$Functionality$,,,1,]]$