(a) Find the values of for which the following integral converges:
Input your answer by writing it as an interval. Enter brackets or parentheses in the first and fourth blanks as appropriate, and enter the interval endpoints in the second and third blanks. Use INF and NINF (in upper-case letters) for positive and negative infinity if needed. If the improper integral diverges for all , type an upper-case "D" in every blank.

Values of are in the interval ,

For the values of at which the integral converges, evaluate it.
Integral =