Write a C++ main program that calls each function listedbelow. Load values into each array using a list to test each function. Print out results to showoriginal array contents and contents after using the functions. All printing should be done inthe main programs – do not print from the functions. Turn in copies of the program and allresults.Output: The output should clearly show original array contents, new array contents (ifmodified), and the result. For example, the output for part B might look as follows:Contents of array A before swap: 1 2 3 4 5 6 7Contents of array B before swap: 8 9 10 11 12 13 14Contents of array A after swap: 8 9 10 11 12 13 14Contents of array B after swap: 1 2 3 4 5 6 7 A) Include a function to find the length of a vector stored in an array where the length of anN-dimensional vector L is:Length = sqrt L 0^2 + L 1^2 + L 2^ +  L n-1^2B) Form of function call: Result = Length(A, Size)B) Include a function to swap the contents of two equal size arrays named A and B.Form of function call: Swap(A, B, Size) C) Include a function to reverse the contents of an array. For example, an array thatoriginally contained the elements 1,2,3,4 would contain 4,3,2,1 after the function call.Form of function call: Reverse(A, Size)