Define a custom exception class that inherits from the built$-$in Exception class. Implement a Java program with two methods: triggerException and processException. The triggerException method should initially throw a custom exception. The processException method should call triggerException, catch the exception thrown by triggerException and $$rethrow$$ the caught exception. In the main method, call processException and catch the rethrown exception. Print the stack trace of the rethrown exception. Analyze the stack trace to understand the exception propagation.