<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def read_and_write(self, reader, writer, chunk_size):
 """ Read ``chunk_size`` from ``reader``, writing result to ``writer``. Returns ``None`` if successful, or ``True`` if the read was empty. .. versionadded:: 2.0 """

        data = reader.recv(chunk_size)
        if len(data) == 0:
            return True
        writer.sendall(data)