QUESTION 2 a. Answer the questions related to the following function: (4 marks) def mystery (a, b, c, e): x=a y=b x=x+1 y=y*2 return x+y+e . What would be a good name for the function instead of mystery? (1 mark) Is the function a void function or a value returning function? (1 mark) How many parameters (arguments) does it specify? Can the list of arguments be simplified? If yes, how? (1 mark) How many local variables is the function using? How can these variables be accessible from outside the function? (1 mark) . . b. Write a python function called occurrences that takes as parameters: an integer number n (the size or length of the list), a list of n integers and a number x. (6 marks) The function should return the number of occurrences (the number of repetitions) of x in the list. (4 marks) Use the function in a program and show its execution. (2 marks) . Note: Your programs should not use any of the built-in functions of list. For b, you should add a screenshot of the code execution