Can someone please explain why these variable type pointers are equivalent? I don't understand, please explain very clearly and concisely

Q7) If a C++ compiler chose to implement a variable of type char const*& as a pointer, what would the pointer variables (exact equivalent) type be? Answer: __char const ** const_ [2 marks] Q8) If a C++ compiler chose to implement a variable of type Foo& as a pointer, what would the pointer variable's (exact equivalent) type be? Answer: _ Foo * const_ _ [2 marks] Q9) If a C++ compiler chose to implement a variable of type Bar*&& as a pointer, what would the pointer variable's (exact equivalent) type be? Answer: _Bar * * const [2 marks]