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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 install_trigger(connection: connection, table: str, schema: str='public', overwrite: bool=False) -> None: """Install a psycopg2-pgevents trigger against a table. Parameters connection: psycopg2.extensions.connection Active connection to a PostGreSQL database. table: str Table for which the trigger should be installed. schema: str Schema to which the table belongs. overwrite: bool Whether or not to overwrite existing installation of trigger for the given table, if existing installation is found. Returns ------- None """

    prior_install = False

    if not overwrite:
        prior_install = trigger_installed(connection, table, schema)

    if not prior_install:
        log('Installing {}.{} trigger...'.format(schema, table), logger_name=_LOGGER_NAME)

        statement = INSTALL_TRIGGER_STATEMENT.format(
            schema=schema,
            table=table
        )
        execute(connection, statement)
    else:
        log('{}.{} trigger already installed; skipping...'.format(schema, table), logger_name=_LOGGER_NAME)