Create a C++ (.cpp) program for this

2. (5 points) Ask the user to enter a positive integer n. Calculate the sum: 1+2+3,,+n (sum of first n positive integers), also the sum of the first n squares i.e. 1+22+32+42++n2, then the sum of the first n cubes i.e. 1+23+33+43++n3, and finally the alternating sum: 12+34+56+7 +n i.e. the odds are positive and the evens are negative. Then output the results. Note: For the first three sums, if you know the formulas, you can use them, but make sure to use a for loop at least for the last sum. BONUS 1 point: If you use structs/classes to implement any of your solutions, 1 point will be added to your assignment score