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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 create_node(vm_):
    '''
    Build and submit the XML to create a node
    '''
    # Start the tree
    content = ET.Element('ve')

    # Name of the instance
    name = ET.SubElement(content, 'name')
    name.text = vm_['name']

    # Description, defaults to name
    desc = ET.SubElement(content, 'description')
    desc.text = config.get_cloud_config_value(
        'desc', vm_, __opts__, default=vm_['name'], search_global=False
    )

    # How many CPU cores, and how fast they are
    cpu = ET.SubElement(content, 'cpu')
    cpu.attrib['number'] = config.get_cloud_config_value(
        'cpu_number', vm_, __opts__, default='1', search_global=False
    )
    cpu.attrib['power'] = config.get_cloud_config_value(
        'cpu_power', vm_, __opts__, default='1000', search_global=False
    )

    # How many megabytes of RAM
    ram = ET.SubElement(content, 'ram-size')
    ram.text = config.get_cloud_config_value(
        'ram', vm_, __opts__, default='256', search_global=False
    )

    # Bandwidth available, in kbps
    bandwidth = ET.SubElement(content, 'bandwidth')
    bandwidth.text = config.get_cloud_config_value(
        'bandwidth', vm_, __opts__, default='100', search_global=False
    )

    # How many public IPs will be assigned to this instance
    ip_num = ET.SubElement(content, 'no-of-public-ip')
    ip_num.text = config.get_cloud_config_value(
        'ip_num', vm_, __opts__, default='1', search_global=False
    )

    # Size of the instance disk
    disk = ET.SubElement(content, 've-disk')
    disk.attrib['local'] = 'true'
    disk.attrib['size'] = config.get_cloud_config_value(
        'disk_size', vm_, __opts__, default='10', search_global=False
    )

    # Attributes for the image
    vm_image = config.get_cloud_config_value(
        'image', vm_, __opts__, search_global=False
    )
    image = show_image({'image': vm_image}, call='function')
    platform = ET.SubElement(content, 'platform')
    template = ET.SubElement(platform, 'template-info')
    template.attrib['name'] = vm_image
    os_info = ET.SubElement(platform, 'os-info')
    os_info.attrib['technology'] = image[vm_image]['technology']
    os_info.attrib['type'] = image[vm_image]['osType']

    # Username and password
    admin = ET.SubElement(content, 'admin')
    admin.attrib['login'] = config.get_cloud_config_value(
        'ssh_username', vm_, __opts__, default='root'
    )
    admin.attrib['password'] = config.get_cloud_config_value(
        'password', vm_, __opts__, search_global=False
    )

    data = ET.tostring(content, encoding='UTF-8')

    __utils__['cloud.fire_event'](
        'event',
        'requesting instance',
        'salt/cloud/{0}/requesting'.format(vm_['name']),
        args={
            'kwargs': __utils__['cloud.filter_event']('requesting', data, list(data)),
        },
        sock_dir=__opts__['sock_dir'],
        transport=__opts__['transport']
    )

    node = query(action='ve', method='POST', data=data)
    return node