Make a program in C ++ to define a vector of 20 elements In the same program implement the functions: Read function: Assigns a value read from a file to each element of the vector. Show function: Displays all the elements of the vector on the screen. Sum function: Returns the sum of the elements of the vector that must be implemented exclusively with pointers. Search function: Returns the number of elements that are less than a value entered by keyboard. Sort: using some sort method returns the elements of the vector ordered descendingly. Show code, and screenshot