I'm confused. This is obviously a homework problem. For that, you don't deserve a code answer. You are supposed to produce something like:
Value: 1, Square: 1, Cube: 1, Sqrt: 1
Value: 2, Square: 4, Cube: 8, Sqrt: 1.4142135623731
Value: 3, Square: 9, Cube: 27, Sqrt: 1.73205080756888
Value: 4, Square: 16, Cube: 64, Sqrt: 2
Value: 5, Square: 25, Cube: 125, Sqrt: 2.23606797749979
Value: 6, Square: 36, Cube: 216, Sqrt: 2.44948974278318
Value: 7, Square: 49, Cube: 343, Sqrt: 2.64575131106459
Value: 8, Square: 64, Cube: 512, Sqrt: 2.82842712474619
Value: 9, Square: 81, Cube: 729, Sqrt: 3
Value: 10, Square: 100, Cube: 1000, Sqrt: 3.16227766016838
Value: 11, Square: 121, Cube: 1331, Sqrt: 3.3166247903554
Value: 12, Square: 144, Cube: 1728, Sqrt: 3.46410161513775
Sum of all Sqrt values: 29.2490045916973
I wrote the code to do that in 11 lines. The square and cubes are simple math statements, you just need to know how to calculate them. That's obviously part of your homework. There are equations for finding the N'th root of numbers, but you don't even have to know that fairly advanced mathmatics. The square root is a built-in function of the Math tool. (A built-in part of the system namespace.)
I've probably given you more help than your teacher wanted you to have in order to solve this.