C++ help needed. please answer questions simply and accurately, thank you

Pointers What is a pointer? Why use pointers? What does the declaration of a pointer look like? How do you assign (or reassign a pointer)? What is a pointer initialized to? What is nullptr? What does it mean to dereference a pointer? What is the membership operator and the indirect membership operator? References What is a reference? What does the declaration of a reference look like? What are the advantages and disadvantages of pointers versus references? Passing by reference/pointer What is passing by reference versus passing by value? Dynamic Memory What is the stack and the heap? What is dynamic memory? What is the function of new and delete