Will give brainliest!!! Help on second question please.

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

Use set buikder notation to represent the following set: {, -2, -1, 0}

Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?