Draw the structures of the following compounds.
(i) 3-Methylbutanal                            (ii) p-Nitropropiophenone
(iii) p-Methylbenzaldehyde                 (iv) 4-Methylpent-3-en-2-one
(v) 4-Chloropentan-2-one                  (vi) 3-Bromo-4-phenylpentanoic acid
(vii) p,p-Dihydroxybenzophenone     (viii) Hex-2-en-4-ynoic acid