1. What is the precedence when there are a global variable in the program with the same name? 2. What is C++? 3. What is the difference between user defined and predefined headers? 4. What are the different data types present in C++? 5. Write a C++ program to calculate area and perimeter of parallelogram 6. Write a C++ program to enter velocity, Acceleration and Time and print the final velocity using the formula: V = u+a*t ​