Given that
$$\log _ { a } x = \log _ { a } 16 - \log _ { a } 2$$
write down the value of \(x\).
Given that
$$\log _ { a } y = 2 \log _ { a } 3 + \log _ { a } 4 + 1$$
express \(y\) in terms of \(a\), giving your answer in a form not involving logarithms.