helpe mo to do this 4 steps of program, with C++ code.

Open Recursion 1Project program then: 1. Add a method named sumEven Nums() in the sumEvenNums C++ file which finds and returns the sum of all even integers from 1 to any given number. When you run the program, the output will look like: Enter a non-negative number : 10 The sum of all even numbers from 1 up to 10 is 30 Program ended with exit code: e 2. Add a method named subNums() in the subNums C++ file which finds and returns the difference of all integers from 1 to any given number. For example, if number =5, the result should be (1-2-3-4-5) i.e. -13 When you run the program, the output will look like: Enter a non-negative number : 5 The subtraction of all number from 1 up to 5 is -13 Program ended with exit code: B 3. Add a method named ArrayReverse() in the Array Reverse CH4 file which reverses the elements of an array without using any extra array. When you run the program, the output will look like: How many elements in the array? 5 Enter the elements of array Enter element 1---> 5 Enter element 2---> 6 Enter element 3---> 7 Enter element 4---> 8 Enter element 5---> 9 Array elements before reversing are [5,6,7,8,9,1 Array elements after reversing are (9,8,7,6,5,) Program ended with exit code: @ 4. Add a method named RevIntRecursive() in the RevIntRecursive C++ file which displays an integer number in reverse. When you run the program, the output will look like: What number do you want to reverse the digits of: 12345 >reverseDigits ( 12345) is 54321 Program ended with exit code