a few problems I had to do for homework. Just wondering if someone could correct me?

Directions - Simplify Expressions with Rational Exponents

1. (8/27)^-2/3 = I got 9/4 for an answer

2. x^1/5 / x^3/10 = my answer.....X^1/10

3. (A^3 b^6)^1/3 = ab^2

4. (a^2/3 b^2)^6 (a^3 b^3)^1/3 = A^5b^13

5. (4c^5/3 / a^-1/4 b^5/6)^-3/2 = b^5/4 / 8c^5/2 a^3/8

confusing as heck to read. I could take pictures of the problems and answers like I did yesterday but someone told me not to do that i guess?