1. Why is it important to minimise the number of messages exchanged by services? 2. Explain why services should always include an exception interface which is used to report faults and exceptions to service clients. 3. Using the same notation, extend Figure 31.6 to include definitions for MaxMinType and InDataFault. The temperatures should be represented as integers with an additional field indicating whether the temperature is in degrees Fahrenheit or degrees Celsius. InDataFault should be a simple type consisting of an error code.