The Answer should be in C++

(Stopwatch) Design a class named Stopwatch. The class contains: Private data fields startTime and endTime with get functions. A no-arg constructor that initializes startTime with the current time. A function named start() that resets the start Time to current time. A function named stop () that sets the endTime to current time. A function named getElapsedTime() that returns the elapsed time for the stop watch in milliseconds Draw the UML diagram for the class. Implement the class. Write a test program that measures the execution time of sorting 100000 numbers using selection sort