2 Individual Questions 1. Explain the concept of a pointer in C++. (2 marks) 2. Why do we have the heap as well as the stack? (2 marks) 3. Why is it important to call delete at some point after calling new? (1 mark) 4. What happens if we call delete twice on the same pointer? (1 mark) 5. We have a function with three parameters: a pointer to a character array (also known as a C-String), and two pointers to specific characters (we will assume that they point to characters in the C-String) void stringPointerOperation(char* str, char* firstPtr, char* secondPtr)1 cout