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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def systemInformationType13():
 """SYSTEM INFORMATION TYPE 13 Section 9.1.43a"""

    a = L2PseudoLength(l2pLength=0x00)
    b = TpPd(pd=0x6)
    c = MessageType(mesType=0x0)  # 00000000
    d = Si13RestOctets()
    packet = a / b / c / d
    return packet