Which simplifications of the powers of i are correct?

Question

i^5 = i^3⋅i^2 = i⋅−1 = −i

i^7 = i^4⋅i^3 = 1⋅−i = −i

i^7 = i^4⋅i^3 = −1⋅−i = i

i^8 = i^4⋅i^4 = −1⋅−1= 1

i^5 = i^3⋅i^2 = −i⋅−1 = i

i^6 = i^4⋅i^2 = 1⋅−1 = −1

i^8 = i^4⋅i^4 = 1⋅1 = 1

i^6 = i^4⋅i^2 = −1⋅−1 = 1

Answer 1

i^7 = i^4⋅i^3 = 1⋅−i = −i

i^5 = i^3⋅i^2 = −i⋅−1 = i

i^6 = i^4⋅i^2 = 1⋅−1 = −1

i^8 = i^4⋅i^4 = 1⋅1 = 1