Fabio PalmigianiAmericas correspondent at UpstreamFollow meOpinionTop job at Petrobras is not for the faint of heartChief executive Jean Paul Prates gets grilled over the payment of extraordinary dividendsIn or out: Petrobras has cycled through nine chief executives in the past decade, including current boss Jean Paul Prates, the latest to come under fire from officials in BrasiliaCredit: UPSTREAM/RYTIS DAUKANTAS