Please help me code the following in JAVA

CallStack class:

2. Handling exceptions a. b. c. d. Download the following file from the class website: CallStack.java Examine the code to determine what it does. Compile and execute the code. Modify the main0 method to handle the exception that is propagated to it. Use a try- catch block to display a meaningful error message when the exception occurs. Test your code. Notice that, although the exception was thrown in func2, it is caught by the catch block in the main method. e