Question: Given the list staffinfo = [[Betty,Amy,Peter,Alex,Eric,Lisa,John,Crystal], ['python', 'java', 'C', 'C', 'java', 'python', 'ruby', 'python']] Write the python to return a list of the programming

Given the list staffinfo = [["Betty","Amy","Peter","Alex","Eric","Lisa","John","Crystal"], ['python', 'java', 'C', 'C', 'java', 'python',

Given the list staffinfo = [["Betty","Amy","Peter","Alex","Eric","Lisa","John","Crystal"], ['python', 'java', 'C', 'C', 'java', 'python', 'ruby', 'python']] Write the python to return a list of the programming languages mastered by the staffs as illustrated below: ['C', 'ruby', 'java', 'python']

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