$1)\_\_\_\_\_\_\_\_\_$ are used to capture the requirements of a system and also can be used tospecify the context of a system.Generalization $/$ Flow chart $/$ Use case diagram$($s$)/$ include $/$ DFD diagram$($s$)/$Statechart diagrams$)/$ Sequence diagram$($s$)/$ Class diagram$($s$)/$ Communication diagram$($s$)/$ Aggregation $/$ extend $/$ Context $/$ Activity diagram$($s$)/$ Specialization $/$ states