Evaluate the following. Click on "Not a real number" if applicable. (a) \( (-625)^{\frac{1}{4}}=\square \) (b) \( \quad(-216)^{\frac{1}{3}}=\square \)

To evaluate the expressions: (a) The fourth root of \(-625\) is not a real number because we cannot raise a negative number to an even root and get a real number. Thus, \( (-625)^{\frac{1}{4}} = \text{Not a real number} \). (b) The cube root of \(-216\) is \(-6\) since \((-6)^3 = -216\). Therefore, \( (-216)^{\frac{1}{3}} = -6 \).