In the fragments “the country exports advanced passenger aircraft and high fashion design while simultaneously grappling with…

In the fragments “the country exports advanced passenger aircraft and high fashion design while simultaneously grappling with tens of millions struggling to survive in poverty” (lines 10-13) and “The ability of Brazilian diplomats to carry off this double identity rests in the country’s carefully constructed position as the intermediate or bridging ground between the South and the North.” (lines 52-55), ‘grappling with’ and carry off’ mean, respectively: