A value-returning function returns only integer values. e. 7. Consider the following statements: double numl, num2, num3; int int1, int2, int3; int value; numl 5.0; num2- 6.0; num3 3.0; and the function prototype: double cube (double a, double b, double c) Which of the foliowing tates.ents are valis? If they are invalid, esplain wy a. value cube (num1, 15.0, num3) b. cout