Figure 2.1, 2.2 and 2.3 show program segments which contain user-defined function. Analyze all the program segments and trace the process in each function. Your analysis must include the followings:

1. By providing appropriate initial value of each variable, demonstrate the process described in function definition in each Figure 2.1, 2.2 and 2.3.
2. At the end of each program segment in Figure 2.1, 2.2 and 2.3, trace the final value of all variables based on input given in (a)
3. Discuss and compare the similarity/difference between function definitions written in each figure and justify why such final values are obtained. Relate your answer with the final value of variables from (b) in your discussion.