<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def notificationResponse():
 """NOTIFICATION RESPONSE Section 9.1.21d"""

    a = TpPd(pd=0x6)
    b = MessageType(mesType=0x26)  # 00100110
    c = MobileStationClassmark2()
    d = MobileId()
    e = DescriptiveGroupOrBroadcastCallReference()
    packet = a / b / c / d / e
    return packet