Given x = log₁₀ 12, y = log₄ 2 × log₁₀ 9 and z = log₁₀ 0.4, find :

(i) x - y - z

(ii) 13^{x - y - z}

Evaluate :

log_b a × log_c b × log_a c

Evaluate :

log₃ 8 ÷ log₉ 16