In this question, we use DFAs to represent possible behaviours of systems. Consider the two DAs below; they present vastly simplified models of the patterns of interaction of an emeregncy call system and an operator, reached by calling $999.$ The alphabet I of both DFAs is $\{999,$ disconnect, crime, fire, patrolcar, firetruckyThe call system DFA C simply requires that after an occurrence of $999,$ any other symbols can occur, but at the end a disconnect symbol must occur.