Question: Which part fault requires the most number of skills to fix? List part id and name.
SQL: SELECT T1.part_id ,  T1.part_name FROM Parts AS T1 JOIN Part_Faults AS T2 ON T1.part_id  =  T2.part_id JOIN Skills_Required_To_Fix AS T3 ON T2.part_fault_id  =  T3.part_fault_id GROUP BY T1.part_id ORDER BY count(*) DESC LIMIT 1