Q4. [Array Based Implementation of List] [20 points] Given below is the header file for a class called ListType_Q4.h defined as follows #include "ItemType.h" // type definition declared here class ListType_Q4 public: ListType Q40; int DeleteFromFirstPositionO; private: int length; int info[AX Your task is to provide the ListType_Q4.cpp implementation. Here is the skeleton of the ListType_Q4.cpp file. /7Implementation file for ListType_Q4.h #include "ListType_Q4.h" ListType_Q4: :ListType Q4O // provide the body // This method deletes the first element at array position ZERO and returns // it as a return parameter and moves the remaining elements one position // up while maintaining the order of elements int ListType_Q4::DeleteFromFirstPositionO) // provide the body