Opsequences alert x1:X op5 x2:X op1 op2 x3:X op3 орб y1:Y op4 op2 op3 z1:Z new remove ZA
Given the above sequence diagram, select the correct statements. a. op6 and op2 belong to class Y. b. The remove message terminates the life of z1. C. The alert message creates x1. d. op6 and op4 are examples of two different message types for class Y. e. The op2 message of x2 invoked by the object x3 is the reply message to op1. f. The message new does not correspond to an operation of class Z.
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