1. Implement a C++ class named Pendulum to represent a simple pendulum. 2. The class should have private member variables for the length of the pendulum (length) and the acceleration due to gravity (gravity). 3. Provide a constructor to initialize these variables. 4. Implement a member function calculatePeriod within the Pendulum class to calculate and return the period of the pendulum using the formula: T=2 sqrt(length/gravity). 5. Implement a member function displaynfo to display information about the pendulum, including its length, gravity, and calculated period. 6. In the main function, create an instance of the Pendulum class with a length of 1.5 meters and gravity of 9.8m/s2. 7. Call the displaylnfo function to print the information about the pendulum