Simplify:

(i) 2^2/3 * 2^1/5 = 2^{2/3 + 1/5} = 2^{10/15 + 3/15} = 2^13/15

(ii) (1/3)⁷ = 3-21

(iii)11^1/2/11⁴ = 11^{1/2 – 1/4} = 11^{2/4 – 1/4} = 11^1/4

(iv)7^1/2 * 8^1/2 = 7 * 8^1/2 = 56^1/2