Write the structure and the IUPAC name of the following carboxylic acid.
(i) `gamma`-Methylvaleric acid

Explanation

(i) `underset("Hexanoic acid")(overset(6)(CH_(3))overset(5)(CH_(2))overset(4)(CH_(2))overset(3)(CH_(2))overset(2)(CH_(2))overset(1)(COOH))` , (ii)
(iii) `underset(4-"Methylpentanoic acid")(overset(5)(CH_(3))-overset(4)underset(CH_(3))underset(|)(CH)overset(3)(CH_(2))overset(2)(CH_(2))overset(1)(COOH)` , (iv) `underset("Hexa-2,4-dienoic acid")(overset(6)(CH_(3))-overset(5)(CH)=overset(4)(CH)-overset(3)(CH)=overset(2)(CH)-overset(1)COOH`
(v) `underset(2,3-"Dihydroxybutanedioic acid")(HOO overset(1)(C)-underset(OH)underset(|)overset(2)(CH)-underset(OH)underset(|)overset(3)(CH)-overset(4)COOH` , (vi) `underset("Butanedioic acid")(HOOoverset(1)C-overset(2)(CH_(2))-overset(3)(CH_(2))-overset(4)COOH`