Concurrency 11 The University of Jordan has three main gates. For security reasons, management requires to keep a current count of all individuals who are inside the campus. Each gate has a counting machine based on a card-swipe machine for entry and another for exit. 1. Write a Counter class that holds a count for all individuals in the university campus. 2. Write an Entry class representing an entrance with a card-swipe machine that increments the counter when a student passes through the entrance. 3. Write an Exit class representing an exit with a card-swipe machine that decrements the counter when a student leave through the exit door. 4. Write a test program TestCount to test three gates each fitted with one entrance and one exit threads. A gate is an object you should write and instantiate for each University physical university gate (gates needn't be threads). In your solution, synchronize parts of your program to avoid effects of interleaving and memory inconsistencies. Furthermore, use Git to document your progress