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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 btc_privkey_scriptsig_classify(private_key_info):
 """ What kind of scriptsig can this private key make? """

    if btc_is_singlesig(private_key_info):
        return 'p2pkh'

    if btc_is_multisig(private_key_info):
        return 'p2sh'

    if btc_is_singlesig_segwit(private_key_info):
        return 'p2sh-p2wpkh'

    if btc_is_multisig_segwit(private_key_info):
        return 'p2sh-p2wsh'

    return None