Give the IUPAC names of the following compounds:
(i) PhCH2CH2COOH
(ii) (CH3)2CCHCOOH]
(i) 3-Phenylpropanoic acid
(ii) 3-Methylbut-2-enoic acid
(iii) 2-Methylcyclopentanecarboxylic acid
(iv) 2, 4, 6-Trinitrobenzoic acid or 2, 4, 6-Trinitrobenzenecarboxylic acid.