Design and implement the following programs and understand what they do. Exercise 1: Work exercise 12.19, page 490, to design and implement a java program that counts the word in a text file. Make sure you catch possible errors such as Invalid URL and IO Error: No Such File errors.

Exercise 2: Work exercise 12.31, page 492, to design and implement a program to process data from a given text file. See problem statement for details and see sample runs. Make your program modular using separate methods to perform specific tasks, such as reading the names from the files. Use exception handlings as needed.

Exercise 3: Work exercise 12.32, page 493, to design and implement a program to process data from a given text file (used in the previous exercise). See problem statement for details and output format. Make your program modular using separate methods to perform specific tasks, such as reading the names from the files and writing the output table. Use exception handlings as needed.